diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index f06447b..494b953 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -1124,6 +1124,7 @@
             if (target.mode == mode && target.taskInfo != null
                     // Compare component name instead of task-id because transitions will promote
                     // the target up to the root task while getTaskId returns the leaf.
+                    && target.taskInfo.topActivity != null
                     && target.taskInfo.topActivity.equals(mLauncher.getComponentName())) {
                 return true;
             }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index 5144d9a..59393d7 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -243,7 +243,19 @@
         if (!mTouchEnabled) {
             return true;
         }
-        mControllerCallbacks.onTouchEvent(event);
+        if (mIconLayoutBounds.contains((int) event.getX(), (int) event.getY())) {
+            // Don't allow long pressing between icons.
+            return true;
+        }
+        if (mControllerCallbacks.onTouchEvent(event)) {
+            int oldAction = event.getAction();
+            try {
+                event.setAction(MotionEvent.ACTION_CANCEL);
+                return super.onTouchEvent(event);
+            } finally {
+                event.setAction(oldAction);
+            }
+        }
         return super.onTouchEvent(event);
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
index 40b0e18..f1748af 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
@@ -223,7 +223,11 @@
             return view -> mControllers.taskbarStashController.updateAndAnimateIsStashedInApp(true);
         }
 
-        public void onTouchEvent(MotionEvent motionEvent) {
+        /**
+         * Get the first chance to handle TaskbarView#onTouchEvent, and return whether we want to
+         * consume the touch so TaskbarView treats it as an ACTION_CANCEL.
+         */
+        public boolean onTouchEvent(MotionEvent motionEvent) {
             final float x = motionEvent.getRawX();
             final float y = motionEvent.getRawY();
             switch (motionEvent.getAction()) {
@@ -239,6 +243,7 @@
                         mControllers.taskbarStashController.startStashHint(
                                 /* animateForward= */ false);
                         mCanceledStashHint = true;
+                        return true;
                     }
                     break;
                 case MotionEvent.ACTION_UP:
@@ -249,6 +254,7 @@
                     }
                     break;
             }
+            return false;
         }
     }
 }
diff --git a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
index 6e90a3a..4c46683 100644
--- a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -805,7 +805,9 @@
         mActivityInitListener.unregister();
         mStateCallback.setStateOnUiThread(STATE_GESTURE_CANCELLED | STATE_HANDLER_INVALIDATED);
 
-        TaskViewUtils.setDividerBarShown(mRecentsAnimationTargets.nonApps, true);
+        if (mRecentsAnimationTargets != null) {
+            TaskViewUtils.setDividerBarShown(mRecentsAnimationTargets.nonApps, true);
+        }
 
         // Defer clearing the controller and the targets until after we've updated the state
         mRecentsAnimationController = null;
diff --git a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
index 780032e..0efe666 100644
--- a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
+++ b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
@@ -33,11 +33,8 @@
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
-import android.os.SystemClock;
-import android.util.Log;
 import android.util.SparseIntArray;
 
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.tracing.OverviewComponentObserverProto;
 import com.android.launcher3.tracing.TouchInteractionServiceProto;
 import com.android.launcher3.util.SimpleBroadcastReceiver;
@@ -132,16 +129,6 @@
     private void updateOverviewTargets() {
         ComponentName defaultHome = PackageManagerWrapper.getInstance()
                 .getHomeActivities(new ArrayList<>());
-        if (TestProtocol.sDebugTracing && defaultHome == null) {
-            Log.d(TestProtocol.THIRD_PARTY_LAUNCHER_NOT_SET, "getHomeActivities returned null");
-            while ((defaultHome =
-                    PackageManagerWrapper.getInstance().getHomeActivities(new ArrayList<>()))
-                    == null) {
-                SystemClock.sleep(10);
-            }
-            Log.d(TestProtocol.THIRD_PARTY_LAUNCHER_NOT_SET,
-                    "getHomeActivities returned non-null: " + defaultHome);
-        }
 
         mIsHomeDisabled = mDeviceState.isHomeDisabled();
         mIsDefaultHome = Objects.equals(mMyHomeIntent.getComponent(), defaultHome);
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 810ecce..e99835e 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -1351,8 +1351,10 @@
                 }
                 Log.d(TASK_VIEW_ID_CRASH, "taskViewCount: " + getTaskViewCount()
                         + " " + sb.toString());
+                mRunningTaskViewId = -1;
+            } else {
+                mRunningTaskViewId = newRunningTaskView.getTaskViewId();
             }
-            mRunningTaskViewId = newRunningTaskView.getTaskViewId();
         }
 
         if (mNextPage == INVALID_PAGE) {
@@ -1365,7 +1367,10 @@
         } else if (currentTaskId != -1) {
             currentTaskView = getTaskViewByTaskId(currentTaskId);
             if (currentTaskView != null) {
-                setCurrentPage(indexOfChild(currentTaskView));
+                int currentTaskViewIndex = indexOfChild(currentTaskView);
+                if (mCurrentPage != currentTaskViewIndex) {
+                    setCurrentPage(currentTaskViewIndex);
+                }
             }
         }
 
diff --git a/src/com/android/launcher3/BubbleTextView.java b/src/com/android/launcher3/BubbleTextView.java
index 02ec5e8..e52d1be 100644
--- a/src/com/android/launcher3/BubbleTextView.java
+++ b/src/com/android/launcher3/BubbleTextView.java
@@ -409,6 +409,10 @@
      * Returns true if the touch down at the provided position be ignored
      */
     protected boolean shouldIgnoreTouchDown(float x, float y) {
+        if (mDisplay == DISPLAY_TASKBAR) {
+            // Allow touching within padding on taskbar, given icon sizes are smaller.
+            return false;
+        }
         return y < getPaddingTop()
                 || x < getPaddingLeft()
                 || y > getHeight() - getPaddingBottom()
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 3754dc1..94dbe00 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -555,6 +555,14 @@
     }
 
     @Override
+    public void onMultiWindowModeChanged(boolean isInMultiWindowMode, Configuration newConfig) {
+        super.onMultiWindowModeChanged(isInMultiWindowMode, newConfig);
+        // Always update device profile when multi window mode changed.
+        initDeviceProfile(mDeviceProfile.inv);
+        dispatchDeviceProfileChanged();
+    }
+
+    @Override
     public void onConfigurationChanged(Configuration newConfig) {
         int diff = newConfig.diff(mOldConfig);
         if ((diff & (CONFIG_ORIENTATION | CONFIG_SCREEN_SIZE)) != 0) {
@@ -592,11 +600,9 @@
 
     private void initDeviceProfile(InvariantDeviceProfile idp) {
         // Load configuration-specific DeviceProfile
-        mDeviceProfile = idp.getDeviceProfile(this);
-        if (isInMultiWindowMode()) {
-            mDeviceProfile = mDeviceProfile.getMultiWindowProfile(
-                    this, getMultiWindowDisplaySize());
-        }
+        mDeviceProfile = isInMultiWindowMode()
+                ? mDeviceProfile.getMultiWindowProfile(this, getMultiWindowDisplaySize())
+                : idp.getDeviceProfile(this);
 
         onDeviceProfileInitiated();
         mModelWriter = mModel.getWriter(getDeviceProfile().isVerticalBarLayout(), true, this);
@@ -1195,7 +1201,7 @@
         // Until the workspace is bound, ensure that we keep the wallpaper offset locked to the
         // default state, otherwise we will update to the wrong offsets in RTL
         mWorkspace.lockWallpaperToDefaultPage();
-        mWorkspace.bindAndInitFirstWorkspaceScreen(null /* recycled qsb */);
+        mWorkspace.bindAndInitFirstWorkspaceScreen();
         mDragController.addDragListener(mWorkspace);
 
         // Get the search/delete/uninstall bar
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 696e897..2f9b5af 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -1046,7 +1046,7 @@
     /**
      * If being flinged and user touches the screen, initiate drag; otherwise don't.
      */
-    private void updateIsBeingDraggedOnTouchDown(MotionEvent ev) {
+    protected void updateIsBeingDraggedOnTouchDown(MotionEvent ev) {
         // mScroller.isFinished should be false when being flinged.
         final int xDist = Math.abs(mScroller.getFinalX() - mScroller.getCurrX());
         final boolean finishedScrolling = (mScroller.isFinished() || xDist < mPageSlop / 3);
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 94ec903..b197e1c 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -223,6 +223,9 @@
     // Variables relating to touch disambiguation (scrolling workspace vs. scrolling a widget)
     private float mXDown;
     private float mYDown;
+    private View mQsb;
+    private boolean mIsEventOverQsb;
+
     final static float START_DAMPING_TOUCH_SLOP_ANGLE = (float) Math.PI / 6;
     final static float MAX_SWIPE_ANGLE = (float) Math.PI / 3;
     final static float TOUCH_SLOP_DAMPING_FACTOR = 4;
@@ -548,9 +551,8 @@
 
     /**
      * Initializes and binds the first page
-     * @param qsb an existing qsb to recycle or null.
      */
-    public void bindAndInitFirstWorkspaceScreen(View qsb) {
+    public void bindAndInitFirstWorkspaceScreen() {
         if (!FeatureFlags.QSB_ON_FIRST_SCREEN) {
             return;
         }
@@ -558,10 +560,10 @@
         // Add the first page
         CellLayout firstPage = insertNewWorkspaceScreen(Workspace.FIRST_SCREEN_ID, getChildCount());
         // Always add a QSB on the first screen.
-        if (qsb == null) {
+        if (mQsb == null) {
             // In transposed layout, we add the QSB in the Grid. As workspace does not touch the
             // edges, we do not need a full width QSB.
-            qsb = LayoutInflater.from(getContext())
+            mQsb = LayoutInflater.from(getContext())
                     .inflate(R.layout.search_container_workspace, firstPage, false);
         }
 
@@ -570,8 +572,9 @@
         CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, firstPage.getCountX(),
                 cellVSpan);
         lp.canReorder = false;
-        if (!firstPage.addViewToCellLayout(qsb, 0, R.id.search_container_workspace, lp, true)) {
+        if (!firstPage.addViewToCellLayout(mQsb, 0, R.id.search_container_workspace, lp, true)) {
             Log.e(TAG, "Failed to add to item at (0, 0) to CellLayout");
+            mQsb = null;
         }
     }
 
@@ -581,9 +584,8 @@
         disableLayoutTransitions();
 
         // Recycle the QSB widget
-        View qsb = findViewById(R.id.search_container_workspace);
-        if (qsb != null) {
-            ((ViewGroup) qsb.getParent()).removeView(qsb);
+        if (mQsb != null) {
+            ((ViewGroup) mQsb.getParent()).removeView(mQsb);
         }
 
         // Remove the pages and clear the screen models
@@ -596,7 +598,7 @@
         mLauncher.mHandler.removeCallbacksAndMessages(DeferredWidgetRefresh.class);
 
         // Ensure that the first page is always present
-        bindAndInitFirstWorkspaceScreen(qsb);
+        bindAndInitFirstWorkspaceScreen();
 
         // Re-enable the layout transitions
         enableLayoutTransitions();
@@ -922,17 +924,25 @@
     }
 
     @Override
-    public boolean onInterceptTouchEvent(MotionEvent ev) {
-        if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) {
-            mXDown = ev.getX();
-            mYDown = ev.getY();
+    protected void updateIsBeingDraggedOnTouchDown(MotionEvent ev) {
+        super.updateIsBeingDraggedOnTouchDown(ev);
+
+        mXDown = ev.getX();
+        mYDown = ev.getY();
+        if (mQsb != null) {
+            mTempFXY[0] = mXDown + getScrollX();
+            mTempFXY[1] = mYDown + getScrollY();
+            Utilities.mapCoordInSelfToDescendant(mQsb, this, mTempFXY);
+            mIsEventOverQsb = mQsb.getLeft() <= mTempFXY[0] && mQsb.getRight() >= mTempFXY[0]
+                    && mQsb.getTop() <= mTempFXY[1] && mQsb.getBottom() >= mTempFXY[1];
+        } else {
+            mIsEventOverQsb = false;
         }
-        return super.onInterceptTouchEvent(ev);
     }
 
     @Override
     protected void determineScrollingStart(MotionEvent ev) {
-        if (!isFinishedSwitchingState()) return;
+        if (!isFinishedSwitchingState() || mIsEventOverQsb) return;
 
         float deltaX = ev.getX() - mXDown;
         float absDeltaX = Math.abs(deltaX);
diff --git a/src/com/android/launcher3/testing/TestProtocol.java b/src/com/android/launcher3/testing/TestProtocol.java
index c484811..42a38b6 100644
--- a/src/com/android/launcher3/testing/TestProtocol.java
+++ b/src/com/android/launcher3/testing/TestProtocol.java
@@ -117,7 +117,6 @@
     public static final String PERMANENT_DIAG_TAG = "TaplTarget";
     public static final String WORK_PROFILE_REMOVED = "b/159671700";
     public static final String FALLBACK_ACTIVITY_NO_SET = "b/181019015";
-    public static final String THIRD_PARTY_LAUNCHER_NOT_SET = "b/187080582";
     public static final String TASK_VIEW_ID_CRASH = "b/195430732";
     public static final String L3_SWIPE_TO_HOME = "b/192018189";
 }