diff --git a/quickstep/src/com/android/launcher3/taskbar/DesktopTaskbarRecentAppsController.java b/quickstep/src/com/android/launcher3/taskbar/DesktopTaskbarRecentAppsController.java
new file mode 100644
index 0000000..acfbea3
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/DesktopTaskbarRecentAppsController.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.taskbar;
+
+import android.app.ActivityManager;
+import android.content.ComponentName;
+import android.util.SparseArray;
+
+import com.android.launcher3.model.data.AppInfo;
+import com.android.launcher3.model.data.ItemInfo;
+import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.quickstep.RecentsModel;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Provides recent apps functionality specifically in a desktop environment.
+ */
+public class DesktopTaskbarRecentAppsController extends TaskbarRecentAppsController {
+
+    private final TaskbarActivityContext mContext;
+    private ArrayList<ItemInfo> mRunningApps = new ArrayList<>();
+    private AppInfo[] mApps;
+
+    public DesktopTaskbarRecentAppsController(TaskbarActivityContext context) {
+        mContext = context;
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        mApps = null;
+    }
+
+    @Override
+    protected void setApps(AppInfo[] apps) {
+        mApps = apps;
+    }
+
+    @Override
+    protected boolean isEnabled() {
+        return true;
+    }
+
+    /**
+     * Set mRunningApps to hold currently running applications using the list of currently running
+     * tasks. Filtering is also done to ignore applications that are already on the taskbar in the
+     * original hotseat.
+     */
+    @Override
+    protected void updateRunningApps(SparseArray<ItemInfo> hotseatItems) {
+        ArrayList<AppInfo> runningApps = getRunningAppsFromTasks();
+        ArrayList<ItemInfo> filteredRunningApps = new ArrayList<>();
+        for (AppInfo runningApp : runningApps) {
+            boolean shouldAddOnTaskbar = true;
+            for (int i = 0; i < hotseatItems.size(); i++) {
+                if (hotseatItems.keyAt(i) >= mControllers.taskbarActivityContext.getDeviceProfile()
+                        .numShownHotseatIcons) {
+                    break;
+                }
+                if (hotseatItems.valueAt(i).getTargetPackage()
+                        .equals(runningApp.getTargetPackage())) {
+                    shouldAddOnTaskbar = false;
+                    break;
+                }
+            }
+            if (shouldAddOnTaskbar) {
+                filteredRunningApps.add(new WorkspaceItemInfo(runningApp));
+            }
+        }
+        mRunningApps = filteredRunningApps;
+        mControllers.taskbarViewController.commitRunningAppsToUI();
+    }
+
+    /**
+     * Returns a copy of hotseatItems with the addition of currently running applications.
+     */
+    @Override
+    protected ItemInfo[] updateHotseatItemInfos(ItemInfo[] hotseatItemInfos) {
+        // hotseatItemInfos.length would be 0 if deviceProfile.numShownHotseatIcons is 0, so we
+        // don't want to show anything in the hotseat
+        if (hotseatItemInfos.length == 0) return hotseatItemInfos;
+
+        int runningAppsIndex = 0;
+        ItemInfo[] newHotseatItemsInfo = Arrays.copyOf(
+                hotseatItemInfos, hotseatItemInfos.length + mRunningApps.size());
+        for (int i = hotseatItemInfos.length; i < newHotseatItemsInfo.length; i++) {
+            newHotseatItemsInfo[i] = mRunningApps.get(runningAppsIndex);
+            runningAppsIndex++;
+        }
+        return newHotseatItemsInfo;
+    }
+
+
+    /**
+     * Returns a list of running applications from the list of currently running tasks.
+     */
+    private ArrayList<AppInfo> getRunningAppsFromTasks() {
+        ArrayList<ActivityManager.RunningTaskInfo> tasks =
+                RecentsModel.INSTANCE.get(mContext).getRunningTasks();
+        ArrayList<AppInfo> runningApps = new ArrayList<>();
+        // early return if apps is empty, since we would have no AppInfo to compare
+        if (mApps == null)  {
+            return runningApps;
+        }
+
+        Set<String> seenPackages = new HashSet<>();
+        for (ActivityManager.RunningTaskInfo taskInfo : tasks) {
+            if (taskInfo.realActivity == null) continue;
+
+            // If a different task for the same package has already been handled, skip this one
+            String taskPackage = taskInfo.realActivity.getPackageName();
+            if (seenPackages.contains(taskPackage)) continue;
+
+            // Otherwise, get the corresponding AppInfo and add it to the list
+            seenPackages.add(taskPackage);
+            AppInfo app = getAppInfo(taskInfo.realActivity);
+            if (app == null) continue;
+            runningApps.add(app);
+        }
+        return runningApps;
+    }
+
+    /**
+     * Retrieves the corresponding AppInfo for the activity.
+     */
+    private AppInfo getAppInfo(ComponentName activity) {
+        String packageName = activity.getPackageName();
+        for (AppInfo app : mApps) {
+            if (!packageName.equals(app.getTargetPackage())) {
+                continue;
+            }
+            return app;
+        }
+        return null;
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/DesktopTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/DesktopTaskbarUIController.java
index e2359c0..3c76e8e 100644
--- a/quickstep/src/com/android/launcher3/taskbar/DesktopTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/DesktopTaskbarUIController.java
@@ -32,11 +32,14 @@
 
     @Override
     protected void init(TaskbarControllers taskbarControllers) {
+        super.init(taskbarControllers);
         mLauncher.getHotseat().setIconsAlpha(0f);
+        mControllers.taskbarViewController.updateRunningApps();
     }
 
     @Override
     protected void onDestroy() {
+        super.onDestroy();
         mLauncher.getHotseat().setIconsAlpha(1f);
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index 6df31e5..62a11d4 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -354,6 +354,13 @@
     }
 
     @Override
+    public void onExpandPip() {
+        super.onExpandPip();
+        mTaskbarLauncherStateController.updateStateForFlag(FLAG_RESUMED, false);
+        mTaskbarLauncherStateController.applyState();
+    }
+
+    @Override
     public void dumpLogs(String prefix, PrintWriter pw) {
         super.dumpLogs(prefix, pw);
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 36806bc..3145ec3 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -173,13 +173,15 @@
 
         mAccessibilityDelegate = new TaskbarShortcutMenuAccessibilityDelegate(this);
 
+        final boolean isDesktopMode = getPackageManager().hasSystemFeature(FEATURE_PC);
+
         // Construct controllers.
         mControllers = new TaskbarControllers(this,
                 new TaskbarDragController(this),
                 buttonController,
-                getPackageManager().hasSystemFeature(FEATURE_PC)
-                        ? new DesktopNavbarButtonsViewController(this, navButtonsView) :
-                        new NavbarButtonsViewController(this, navButtonsView),
+                isDesktopMode
+                        ? new DesktopNavbarButtonsViewController(this, navButtonsView)
+                        : new NavbarButtonsViewController(this, navButtonsView),
                 new RotationButtonController(this,
                         c.getColor(R.color.taskbar_nav_icon_light_color),
                         c.getColor(R.color.taskbar_nav_icon_dark_color),
@@ -202,7 +204,10 @@
                 new TaskbarForceVisibleImmersiveController(this),
                 new TaskbarAllAppsController(this, dp),
                 new TaskbarInsetsController(this),
-                new VoiceInteractionWindowController(this));
+                new VoiceInteractionWindowController(this),
+                isDesktopMode
+                        ? new DesktopTaskbarRecentAppsController(this)
+                        : TaskbarRecentAppsController.DEFAULT);
     }
 
     public void init(@NonNull TaskbarSharedState sharedState) {
@@ -622,7 +627,9 @@
 
     /** Adds the given view to WindowManager with the provided LayoutParams (creates new window). */
     public void addWindowView(View view, WindowManager.LayoutParams windowLayoutParams) {
-        mWindowManager.addView(view, windowLayoutParams);
+        if (!view.isAttachedToWindow()) {
+            mWindowManager.addView(view, windowLayoutParams);
+        }
     }
 
     /** Removes the given view from WindowManager. See {@link #addWindowView}. */
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
index d7b50b0..2b80b75 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
@@ -53,6 +53,7 @@
     public final TaskbarAllAppsController taskbarAllAppsController;
     public final TaskbarInsetsController taskbarInsetsController;
     public final VoiceInteractionWindowController voiceInteractionWindowController;
+    public final TaskbarRecentAppsController taskbarRecentAppsController;
 
     @Nullable private LoggableTaskbarController[] mControllersToLog = null;
 
@@ -82,7 +83,8 @@
             TaskbarForceVisibleImmersiveController taskbarForceVisibleImmersiveController,
             TaskbarAllAppsController taskbarAllAppsController,
             TaskbarInsetsController taskbarInsetsController,
-            VoiceInteractionWindowController voiceInteractionWindowController) {
+            VoiceInteractionWindowController voiceInteractionWindowController,
+            TaskbarRecentAppsController taskbarRecentAppsController) {
         this.taskbarActivityContext = taskbarActivityContext;
         this.taskbarDragController = taskbarDragController;
         this.navButtonController = navButtonController;
@@ -102,6 +104,7 @@
         this.taskbarAllAppsController = taskbarAllAppsController;
         this.taskbarInsetsController = taskbarInsetsController;
         this.voiceInteractionWindowController = voiceInteractionWindowController;
+        this.taskbarRecentAppsController = taskbarRecentAppsController;
     }
 
     /**
@@ -130,6 +133,7 @@
         navButtonController.init(this);
         taskbarInsetsController.init(this);
         voiceInteractionWindowController.init(this);
+        taskbarRecentAppsController.init(this);
 
         mControllersToLog = new LoggableTaskbarController[] {
                 taskbarDragController, navButtonController, navbarButtonsViewController,
@@ -178,6 +182,7 @@
         navButtonController.onDestroy();
         taskbarInsetsController.onDestroy();
         voiceInteractionWindowController.onDestroy();
+        taskbarRecentAppsController.onDestroy();
 
         mControllersToLog = null;
     }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java
index 75881a3..5e670d294 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java
@@ -29,6 +29,7 @@
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.LauncherBindableItemsContainer;
+import com.android.quickstep.RecentsModel;
 
 import java.io.PrintWriter;
 import java.util.ArrayList;
@@ -42,7 +43,7 @@
  * Launcher model Callbacks for rendering taskbar.
  */
 public class TaskbarModelCallbacks implements
-        BgDataModel.Callbacks, LauncherBindableItemsContainer {
+        BgDataModel.Callbacks, LauncherBindableItemsContainer, RecentsModel.RunningTasksListener {
 
     private final SparseArray<ItemInfo> mHotseatItems = new SparseArray<>();
     private List<ItemInfo> mPredictedItems = Collections.emptyList();
@@ -61,6 +62,16 @@
 
     public void init(TaskbarControllers controllers) {
         mControllers = controllers;
+        if (mControllers.taskbarRecentAppsController.isEnabled()) {
+            RecentsModel.INSTANCE.get(mContext).registerRunningTasksListener(this);
+        }
+    }
+
+    /**
+     * Unregisters listeners in this class.
+     */
+    public void unregisterListeners() {
+        RecentsModel.INSTANCE.get(mContext).unregisterRunningTasksListener();
     }
 
     @Override
@@ -185,6 +196,8 @@
                 isHotseatEmpty = false;
             }
         }
+        hotseatItemInfos = mControllers.taskbarRecentAppsController
+                .updateHotseatItemInfos(hotseatItemInfos);
         mContainer.updateHotseatItems(hotseatItemInfos);
 
         final boolean finalIsHotseatEmpty = isHotseatEmpty;
@@ -196,6 +209,21 @@
     }
 
     @Override
+    public void onRunningTasksChanged() {
+        updateRunningApps();
+    }
+
+    /** Called when there's a change in running apps to update the UI. */
+    public void commitRunningAppsToUI() {
+        commitItemsToUI();
+    }
+
+    /** Call TaskbarRecentAppsController to update running apps with mHotseatItems. */
+    public void updateRunningApps() {
+        mControllers.taskbarRecentAppsController.updateRunningApps(mHotseatItems);
+    }
+
+    @Override
     public void bindDeepShortcutMap(HashMap<ComponentKey, Integer> deepShortcutMapCopy) {
         mControllers.taskbarPopupController.setDeepShortcutMap(deepShortcutMapCopy);
     }
@@ -203,6 +231,7 @@
     @Override
     public void bindAllApplications(AppInfo[] apps, int flags) {
         mControllers.taskbarAllAppsController.setApps(apps, flags);
+        mControllers.taskbarRecentAppsController.setApps(apps);
     }
 
     protected void dumpLogs(String prefix, PrintWriter pw) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarRecentAppsController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarRecentAppsController.java
new file mode 100644
index 0000000..8445cff
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarRecentAppsController.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.taskbar;
+
+import android.util.SparseArray;
+
+import androidx.annotation.CallSuper;
+
+import com.android.launcher3.model.data.AppInfo;
+import com.android.launcher3.model.data.ItemInfo;
+
+/**
+ * Base class for providing recent apps functionality
+ */
+public class TaskbarRecentAppsController {
+
+    public static final TaskbarRecentAppsController DEFAULT = new TaskbarRecentAppsController();
+
+    // Initialized in init.
+    protected TaskbarControllers mControllers;
+
+    @CallSuper
+    protected void init(TaskbarControllers taskbarControllers) {
+        mControllers = taskbarControllers;
+    }
+
+    @CallSuper
+    protected void onDestroy() {
+        mControllers = null;
+    }
+
+    /** Stores the current {@link AppInfo} instances, no-op except in desktop environment. */
+    protected void setApps(AppInfo[] apps) { }
+
+    /**
+     * Indicates whether recent apps functionality is enabled, should return false except in
+     * desktop environment.
+     */
+    protected boolean isEnabled() {
+        return false;
+    }
+
+    /** Called to update hotseatItems, no-op except in desktop environment. */
+    protected ItemInfo[] updateHotseatItemInfos(ItemInfo[] hotseatItems) {
+        return hotseatItems;
+    }
+
+    /** Called to update the list of currently running apps, no-op except in desktop environment. */
+    protected void updateRunningApps(SparseArray<ItemInfo> hotseatItems) { }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
index 6d45fd2..077172d 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
@@ -126,6 +126,7 @@
 
     public void onDestroy() {
         LauncherAppState.getInstance(mActivity).getModel().removeCallbacks(mModelCallbacks);
+        mModelCallbacks.unregisterListeners();
     }
 
     public boolean areIconsVisible() {
@@ -389,6 +390,16 @@
         mModelCallbacks.dumpLogs(prefix + "\t", pw);
     }
 
+    /** Called when there's a change in running apps to update the UI. */
+    public void commitRunningAppsToUI() {
+        mModelCallbacks.commitRunningAppsToUI();
+    }
+
+    /** Call TaskbarModelCallbacks to update running apps. */
+    public void updateRunningApps() {
+        mModelCallbacks.updateRunningApps();
+    }
+
     /**
      * Callbacks for {@link TaskbarView} to interact with its controller.
      */
diff --git a/quickstep/src/com/android/launcher3/taskbar/VoiceInteractionWindowController.kt b/quickstep/src/com/android/launcher3/taskbar/VoiceInteractionWindowController.kt
index 946873e..81acda3 100644
--- a/quickstep/src/com/android/launcher3/taskbar/VoiceInteractionWindowController.kt
+++ b/quickstep/src/com/android/launcher3/taskbar/VoiceInteractionWindowController.kt
@@ -36,7 +36,10 @@
 
                 override fun draw(canvas: Canvas) {
                     super.draw(canvas)
-                    taskbarBackgroundRenderer.draw(canvas)
+                    if (this@VoiceInteractionWindowController.context.isGestureNav
+                        && controllers.taskbarStashController.isInAppAndNotStashed) {
+                        taskbarBackgroundRenderer.draw(canvas)
+                    }
                 }
             }
         separateWindowForTaskbarBackground.recreateControllers()
@@ -74,18 +77,20 @@
             fadeStashedHandle.end()
         }
 
-        if (context.isGestureNav && controllers.taskbarStashController.isInAppAndNotStashed) {
-            moveTaskbarBackgroundToLowerLayer()
-        }
+        moveTaskbarBackgroundToAppropriateLayer()
     }
 
     /**
+     * Either:
      * Hides the TaskbarDragLayer background and creates a new window to draw just that background.
+     * OR
+     * Removes the temporary window and show the TaskbarDragLayer background again.
      */
-    private fun moveTaskbarBackgroundToLowerLayer() {
+    private fun moveTaskbarBackgroundToAppropriateLayer() {
         val taskbarBackgroundOverride = controllers.taskbarDragLayerController
             .overrideBackgroundAlpha
-        if (isVoiceInteractionWindowVisible) {
+        val moveToLowerLayer = isVoiceInteractionWindowVisible
+        if (moveToLowerLayer) {
             // First add the temporary window, then hide the overlapping taskbar background.
             context.addWindowView(separateWindowForTaskbarBackground, separateWindowLayoutParams)
             ViewRootSync.synchronizeNextDraw(separateWindowForTaskbarBackground, context.dragLayer
diff --git a/quickstep/src/com/android/quickstep/RecentTasksList.java b/quickstep/src/com/android/quickstep/RecentTasksList.java
index cd93dbe..813e687 100644
--- a/quickstep/src/com/android/quickstep/RecentTasksList.java
+++ b/quickstep/src/com/android/quickstep/RecentTasksList.java
@@ -62,6 +62,10 @@
     private TaskLoadResult mResultsBg = INVALID_RESULT;
     private TaskLoadResult mResultsUi = INVALID_RESULT;
 
+    private RecentsModel.RunningTasksListener mRunningTasksListener;
+    // Tasks are stored in order of least recently launched to most recently launched.
+    private ArrayList<ActivityManager.RunningTaskInfo> mRunningTasks;
+
     public RecentTasksList(LooperExecutor mainThreadExecutor,
             KeyguardManagerCompat keyguardManager, SystemUiProxy sysUiProxy) {
         mMainThreadExecutor = mainThreadExecutor;
@@ -73,7 +77,26 @@
             public void onRecentTasksChanged() throws RemoteException {
                 mMainThreadExecutor.execute(RecentTasksList.this::onRecentTasksChanged);
             }
+
+            @Override
+            public void onRunningTaskAppeared(ActivityManager.RunningTaskInfo taskInfo) {
+                mMainThreadExecutor.execute(() -> {
+                    RecentTasksList.this.onRunningTaskAppeared(taskInfo);
+                });
+            }
+
+            @Override
+            public void onRunningTaskVanished(ActivityManager.RunningTaskInfo taskInfo) {
+                mMainThreadExecutor.execute(() -> {
+                    RecentTasksList.this.onRunningTaskVanished(taskInfo);
+                });
+            }
         });
+        // We may receive onRunningTaskAppeared events later for tasks which have already been
+        // included in the list returned by mSysUiProxy.getRunningTasks(), or may receive
+        // onRunningTaskVanished for tasks not included in the returned list. These cases will be
+        // addressed when the tasks are added to/removed from mRunningTasks.
+        initRunningTasks(mSysUiProxy.getRunningTasks(Integer.MAX_VALUE));
     }
 
     @VisibleForTesting
@@ -154,6 +177,59 @@
         mChangeId++;
     }
 
+     /**
+     * Registers a listener for running tasks
+     */
+    public void registerRunningTasksListener(RecentsModel.RunningTasksListener listener) {
+        mRunningTasksListener = listener;
+    }
+
+    /**
+     * Removes the previously registered running tasks listener
+     */
+    public void unregisterRunningTasksListener() {
+        mRunningTasksListener = null;
+    }
+
+    private void initRunningTasks(ArrayList<ActivityManager.RunningTaskInfo> runningTasks) {
+        // Tasks are retrieved in order of most recently launched/used to least recently launched.
+        mRunningTasks = new ArrayList<>(runningTasks);
+        Collections.reverse(mRunningTasks);
+    }
+
+    /**
+     * Gets the set of running tasks.
+     */
+    public ArrayList<ActivityManager.RunningTaskInfo> getRunningTasks() {
+        return mRunningTasks;
+    }
+
+    private void onRunningTaskAppeared(ActivityManager.RunningTaskInfo taskInfo) {
+        // Make sure this task is not already in the list
+        for (ActivityManager.RunningTaskInfo existingTask : mRunningTasks) {
+            if (taskInfo.taskId == existingTask.taskId) {
+                return;
+            }
+        }
+        mRunningTasks.add(taskInfo);
+        if (mRunningTasksListener != null) {
+            mRunningTasksListener.onRunningTasksChanged();
+        }
+    }
+
+    private void onRunningTaskVanished(ActivityManager.RunningTaskInfo taskInfo) {
+        // Find the task from the list of running tasks, if it exists
+        for (ActivityManager.RunningTaskInfo existingTask : mRunningTasks) {
+            if (existingTask.taskId != taskInfo.taskId) continue;
+
+            mRunningTasks.remove(existingTask);
+            if (mRunningTasksListener != null) {
+                mRunningTasksListener.onRunningTasksChanged();
+            }
+            return;
+        }
+    }
+
     /**
      * Loads and creates a list of all the recent tasks.
      */
diff --git a/quickstep/src/com/android/quickstep/RecentsModel.java b/quickstep/src/com/android/quickstep/RecentsModel.java
index 442578e..3074dbb 100644
--- a/quickstep/src/com/android/quickstep/RecentsModel.java
+++ b/quickstep/src/com/android/quickstep/RecentsModel.java
@@ -236,4 +236,35 @@
         writer.println(prefix + "RecentsModel:");
         mTaskList.dump("  ", writer);
     }
+
+    /**
+     * Registers a listener for running tasks
+     */
+    public void registerRunningTasksListener(RunningTasksListener listener) {
+        mTaskList.registerRunningTasksListener(listener);
+    }
+
+    /**
+     * Removes the previously registered running tasks listener
+     */
+    public void unregisterRunningTasksListener() {
+        mTaskList.unregisterRunningTasksListener();
+    }
+
+    /**
+     * Gets the set of running tasks.
+     */
+    public ArrayList<ActivityManager.RunningTaskInfo> getRunningTasks() {
+        return mTaskList.getRunningTasks();
+    }
+
+    /**
+     * Listener for receiving running tasks changes
+     */
+    public interface RunningTasksListener {
+        /**
+         * Called when there's a change to running tasks
+         */
+        void onRunningTasksChanged();
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/SystemUiProxy.java b/quickstep/src/com/android/quickstep/SystemUiProxy.java
index 9a2619b..0ec7e62 100644
--- a/quickstep/src/com/android/quickstep/SystemUiProxy.java
+++ b/quickstep/src/com/android/quickstep/SystemUiProxy.java
@@ -20,12 +20,14 @@
 import static com.android.launcher3.util.DisplayController.CHANGE_NAVIGATION_MODE;
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
+import android.app.ActivityManager;
 import android.app.PendingIntent;
 import android.app.PictureInPictureParams;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
+import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.Insets;
 import android.graphics.Rect;
@@ -96,7 +98,7 @@
     private IPipAnimationListener mPipAnimationListener;
     private ISplitScreenListener mSplitScreenListener;
     private IStartingWindowListener mStartingWindowListener;
-    private ILauncherUnlockAnimationController mPendingLauncherUnlockAnimationController;
+    private ILauncherUnlockAnimationController mLauncherUnlockAnimationController;
     private IRecentTasksListener mRecentTasksListener;
     private final ArrayList<RemoteTransitionCompat> mRemoteTransitions = new ArrayList<>();
     private IOnBackInvokedCallback mBackToLauncherCallback;
@@ -108,12 +110,14 @@
     private boolean mLastNavButtonAnimate;
     private boolean mHasNavButtonAlphaBeenSet = false;
     private Runnable mPendingSetNavButtonAlpha = null;
+    private Context mContext;
 
     // TODO(141886704): Find a way to remove this
     private int mLastSystemUiStateFlags;
 
     public SystemUiProxy(Context context) {
         DisplayController.INSTANCE.get(context).addChangeListener(this);
+        mContext = context;
     }
 
     @Override
@@ -189,10 +193,8 @@
         if (mStartingWindowListener != null && mStartingWindow != null) {
             setStartingWindowListener(mStartingWindowListener);
         }
-        if (mPendingLauncherUnlockAnimationController != null
-                && mSysuiUnlockAnimationController != null) {
-            setLauncherUnlockAnimationController(mPendingLauncherUnlockAnimationController);
-            mPendingLauncherUnlockAnimationController = null;
+        if (mSysuiUnlockAnimationController != null && mLauncherUnlockAnimationController != null) {
+            setLauncherUnlockAnimationController(mLauncherUnlockAnimationController);
         }
         for (int i = mRemoteTransitions.size() - 1; i >= 0; --i) {
             registerRemoteTransition(mRemoteTransitions.get(i));
@@ -757,11 +759,11 @@
                     controller.dispatchSmartspaceStateToSysui();
                 }
             } catch (RemoteException e) {
-                Log.w(TAG, "Failed call setStartingWindowListener", e);
+                Log.w(TAG, "Failed call setLauncherUnlockAnimationController", e);
             }
-        } else {
-            mPendingLauncherUnlockAnimationController = controller;
         }
+
+        mLauncherUnlockAnimationController = controller;
     }
 
     /**
@@ -870,4 +872,20 @@
         }
         return new ArrayList<>();
     }
+
+    /**
+     * Gets the set of running tasks.
+     */
+    public ArrayList<ActivityManager.RunningTaskInfo> getRunningTasks(int numTasks) {
+        if (mRecentTasks != null
+                && mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_PC)) {
+            try {
+                return new ArrayList<ActivityManager.RunningTaskInfo>(
+                        Arrays.asList(mRecentTasks.getRunningTasks(numTasks)));
+            } catch (RemoteException e) {
+                Log.w(TAG, "Failed call getRunningTasks", e);
+            }
+        }
+        return new ArrayList<>();
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/TopTaskTracker.java b/quickstep/src/com/android/quickstep/TopTaskTracker.java
index 42fa86d..cfcba4c 100644
--- a/quickstep/src/com/android/quickstep/TopTaskTracker.java
+++ b/quickstep/src/com/android/quickstep/TopTaskTracker.java
@@ -20,6 +20,7 @@
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME;
 import static android.content.Intent.ACTION_CHOOSER;
 import static android.content.Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS;
+import static android.view.Display.DEFAULT_DISPLAY;
 
 import static com.android.launcher3.util.SplitConfigurationOptions.STAGE_POSITION_TOP_OR_LEFT;
 
@@ -31,9 +32,9 @@
 
 import com.android.launcher3.util.MainThreadInitializedObject;
 import com.android.launcher3.util.SplitConfigurationOptions;
+import com.android.launcher3.util.SplitConfigurationOptions.SplitStageInfo;
 import com.android.launcher3.util.SplitConfigurationOptions.StagePosition;
 import com.android.launcher3.util.SplitConfigurationOptions.StageType;
-import com.android.launcher3.util.SplitConfigurationOptions.SplitStageInfo;
 import com.android.launcher3.util.TraceHelper;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.recents.model.Task.TaskKey;
@@ -85,6 +86,19 @@
     public void onTaskMovedToFront(RunningTaskInfo taskInfo) {
         mOrderedTaskList.removeIf(rto -> rto.taskId == taskInfo.taskId);
         mOrderedTaskList.addFirst(taskInfo);
+
+        // Keep the home display's top running task in the first while adding a non-home
+        // display's task to the list, to avoid showing non-home display's task upon going to
+        // Recents animation.
+        if (taskInfo.displayId != DEFAULT_DISPLAY) {
+            final RunningTaskInfo topTaskOnHomeDisplay = mOrderedTaskList.stream()
+                    .filter(rto -> rto.displayId == DEFAULT_DISPLAY).findFirst().orElse(null);
+            if (topTaskOnHomeDisplay != null) {
+                mOrderedTaskList.removeIf(rto -> rto.taskId == topTaskOnHomeDisplay.taskId);
+                mOrderedTaskList.addFirst(topTaskOnHomeDisplay);
+            }
+        }
+
         if (mOrderedTaskList.size() >= HISTORY_SIZE) {
             // If we grow in size, remove the last taskInfo which is not part of the split task.
             Iterator<RunningTaskInfo> itr = mOrderedTaskList.descendingIterator();
diff --git a/src/com/android/launcher3/FastScrollRecyclerView.java b/src/com/android/launcher3/FastScrollRecyclerView.java
index 94903f2..747b755 100644
--- a/src/com/android/launcher3/FastScrollRecyclerView.java
+++ b/src/com/android/launcher3/FastScrollRecyclerView.java
@@ -57,7 +57,9 @@
     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
-        bindFastScrollbar();
+        if (mScrollbar == null || !mScrollbar.hasRecyclerView()) {
+            bindFastScrollbar();
+        }
     }
 
     public void bindFastScrollbar() {
diff --git a/src/com/android/launcher3/views/RecyclerViewFastScroller.java b/src/com/android/launcher3/views/RecyclerViewFastScroller.java
index 11ca130..6e6512d 100644
--- a/src/com/android/launcher3/views/RecyclerViewFastScroller.java
+++ b/src/com/android/launcher3/views/RecyclerViewFastScroller.java
@@ -174,6 +174,11 @@
         ta.recycle();
     }
 
+    /** @return whether there is a RecyclerView bound to this scroller. */
+    public boolean hasRecyclerView() {
+        return mRv != null;
+    }
+
     public void setRecyclerView(FastScrollRecyclerView rv, TextView popupView) {
         if (mRv != null && mOnScrollListener != null) {
             mRv.removeOnScrollListener(mOnScrollListener);