diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/OverviewToHomeAnim.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/OverviewToHomeAnim.java
index 4a298d3..1031c5b 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/OverviewToHomeAnim.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/OverviewToHomeAnim.java
@@ -18,8 +18,10 @@
 import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.anim.Interpolators.DEACCEL;
+import static com.android.launcher3.anim.Interpolators.FAST_OUT_SLOW_IN;
 import static com.android.launcher3.anim.Interpolators.FINAL_FRAME;
 import static com.android.launcher3.anim.Interpolators.INSTANT;
+import static com.android.launcher3.anim.Interpolators.clampToProgress;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_ALL_COMPONENTS;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_OVERVIEW_ACTIONS_FADE;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_OVERVIEW_FADE;
@@ -110,7 +112,7 @@
         boolean isLayoutNaturalToLauncher = recentsView.getPagedOrientationHandler()
                 .isLayoutNaturalToLauncher();
         config.setInterpolator(ANIM_OVERVIEW_TRANSLATE_X, isLayoutNaturalToLauncher
-                ? DEACCEL : FINAL_FRAME);
+                ? clampToProgress(FAST_OUT_SLOW_IN, 0, 0.75f) : FINAL_FRAME);
         config.setInterpolator(ANIM_OVERVIEW_TRANSLATE_Y, FINAL_FRAME);
         config.setInterpolator(ANIM_OVERVIEW_SCALE, FINAL_FRAME);
         config.setInterpolator(ANIM_OVERVIEW_ACTIONS_FADE, INSTANT);
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TaskViewSimulator.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TaskViewSimulator.java
index db64464..c060145 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TaskViewSimulator.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TaskViewSimulator.java
@@ -250,7 +250,6 @@
             int start = mOrientationState.getOrientationHandler()
                     .getPrimaryValue(mTaskRect.left, mTaskRect.top);
             mScrollState.screenCenter = start + mScrollState.scroll + mScrollState.halfPageSize;
-            mScrollState.pageParentScale = recentsViewScale.value;
             mScrollState.updateInterpolation(start);
             mCurveScale = TaskView.getCurveScaleForInterpolation(mScrollState.linearInterpolation);
         }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
index 7111b69..0130cae 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
@@ -1386,13 +1386,12 @@
          * Updates linearInterpolation for the provided child position
          */
         public void updateInterpolation(float childStart) {
-            float scaledHalfPageSize = halfPageSize / pageParentScale;
-            float pageCenter = childStart + scaledHalfPageSize;
+            float pageCenter = childStart + halfPageSize;
             float distanceFromScreenCenter = screenCenter - pageCenter;
             // How far the page has to move from the center to be offscreen, taking into account
             // the EDGE_SCALE_DOWN_FACTOR that will be applied at that position.
             float distanceToReachEdge = halfScreenSize
-                    + scaledHalfPageSize * (1 - TaskView.EDGE_SCALE_DOWN_FACTOR);
+                    + halfPageSize * (1 - TaskView.EDGE_SCALE_DOWN_FACTOR);
             linearInterpolation = Math.min(1,
                     Math.abs(distanceFromScreenCenter) / distanceToReachEdge);
         }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskMenuView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskMenuView.java
index 8b49f2c..fb799a8 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskMenuView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskMenuView.java
@@ -251,7 +251,7 @@
         setScaleX(taskView.getScaleX());
         setScaleY(taskView.getScaleY());
         boolean canActivityRotate = taskView.getRecentsView()
-            .mOrientationState.canRecentsActivityRotate();
+            .mOrientationState.isRecentsActivityRotationAllowed();
         mOptionLayout.setOrientation(orientationHandler
                 .getTaskMenuLayoutOrientation(canActivityRotate, mOptionLayout));
         setPosition(sTempRect.left - insets.left, sTempRect.top - insets.top,
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
index 0bc6e51..0d755b8 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
@@ -451,7 +451,10 @@
                             }
                         }, resultCallbackHandler);
             }
-            getRecentsView().onTaskLaunched(mTask);
+            RecentsView recentsView = getRecentsView();
+            if (recentsView != null) {
+                recentsView.onTaskLaunched(mTask);
+            }
         }
     }
 
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index bf63788..681118d 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -141,6 +141,10 @@
     public static final String EXTRA_WALLPAPER_OFFSET = "com.android.launcher3.WALLPAPER_OFFSET";
     public static final String EXTRA_WALLPAPER_FLAVOR = "com.android.launcher3.WALLPAPER_FLAVOR";
 
+    // An intent extra to indicate the launch source by launcher.
+    public static final String EXTRA_WALLPAPER_LAUNCH_SOURCE =
+            "com.android.wallpaper.LAUNCH_SOURCE";
+
     public static boolean IS_RUNNING_IN_TEST_HARNESS =
                     ActivityManager.isRunningInTestHarness();
 
diff --git a/src/com/android/launcher3/model/AppLaunchTracker.java b/src/com/android/launcher3/model/AppLaunchTracker.java
index 629a0ee..906c2e0 100644
--- a/src/com/android/launcher3/model/AppLaunchTracker.java
+++ b/src/com/android/launcher3/model/AppLaunchTracker.java
@@ -41,6 +41,7 @@
     public static final String CONTAINER_PREDICTIONS = Integer.toString(ContainerType.PREDICTION);
     public static final String CONTAINER_SEARCH = Integer.toString(ContainerType.SEARCHRESULT);
     public static final String CONTAINER_OVERVIEW = Integer.toString(ContainerType.OVERVIEW);
+    public static final String CONTAINER_HOTSEAT = Integer.toString(ContainerType.HOTSEAT);
 
 
     public static final MainThreadInitializedObject<AppLaunchTracker> INSTANCE =
diff --git a/src/com/android/launcher3/touch/ItemClickHandler.java b/src/com/android/launcher3/touch/ItemClickHandler.java
index 8486666..f50b2b3 100644
--- a/src/com/android/launcher3/touch/ItemClickHandler.java
+++ b/src/com/android/launcher3/touch/ItemClickHandler.java
@@ -19,6 +19,7 @@
 import static com.android.launcher3.Launcher.REQUEST_RECONFIGURE_APPWIDGET;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_FOLDER_OPEN;
 import static com.android.launcher3.model.AppLaunchTracker.CONTAINER_ALL_APPS;
+import static com.android.launcher3.model.AppLaunchTracker.CONTAINER_HOTSEAT;
 import static com.android.launcher3.model.data.ItemInfoWithIcon.FLAG_DISABLED_BY_PUBLISHER;
 import static com.android.launcher3.model.data.ItemInfoWithIcon.FLAG_DISABLED_LOCKED_USER;
 import static com.android.launcher3.model.data.ItemInfoWithIcon.FLAG_DISABLED_QUIET_USER;
@@ -42,6 +43,7 @@
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
+import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.folder.Folder;
@@ -240,6 +242,12 @@
             }
         }
 
+        if (sourceContainer == null && (
+                shortcut.container == LauncherSettings.Favorites.CONTAINER_HOTSEAT
+                        || shortcut.container
+                        == LauncherSettings.Favorites.CONTAINER_HOTSEAT_PREDICTION)) {
+            sourceContainer = CONTAINER_HOTSEAT;
+        }
         // Start activities
         startAppShortcutOrInfoActivity(v, shortcut, launcher, sourceContainer);
     }
diff --git a/src/com/android/launcher3/touch/LandscapePagedViewHandler.java b/src/com/android/launcher3/touch/LandscapePagedViewHandler.java
index 4fd1633..e64d2bb 100644
--- a/src/com/android/launcher3/touch/LandscapePagedViewHandler.java
+++ b/src/com/android/launcher3/touch/LandscapePagedViewHandler.java
@@ -72,7 +72,6 @@
         out.halfPageSize = view.getNormalChildHeight() / 2;
         out.halfScreenSize = view.getMeasuredHeight() / 2;
         out.screenCenter = insets.top + view.getPaddingTop() + out.scroll + out.halfPageSize;
-        out.pageParentScale = view.getScaleY();
     }
 
     @Override
diff --git a/src/com/android/launcher3/touch/PagedOrientationHandler.java b/src/com/android/launcher3/touch/PagedOrientationHandler.java
index c0d488b..e4a2407 100644
--- a/src/com/android/launcher3/touch/PagedOrientationHandler.java
+++ b/src/com/android/launcher3/touch/PagedOrientationHandler.java
@@ -111,7 +111,6 @@
         public int halfPageSize;
         public int screenCenter;
         public int halfScreenSize;
-        public float pageParentScale;
     }
 
     class ChildBounds {
diff --git a/src/com/android/launcher3/touch/PortraitPagedViewHandler.java b/src/com/android/launcher3/touch/PortraitPagedViewHandler.java
index 9e53e5f..e4662de 100644
--- a/src/com/android/launcher3/touch/PortraitPagedViewHandler.java
+++ b/src/com/android/launcher3/touch/PortraitPagedViewHandler.java
@@ -70,7 +70,6 @@
         out.halfPageSize = view.getNormalChildWidth() / 2;
         out.halfScreenSize = view.getMeasuredWidth() / 2;
         out.screenCenter = insets.left + view.getPaddingLeft() + out.scroll + out.halfPageSize;
-        out.pageParentScale = view.getScaleX();
     }
 
     @Override
diff --git a/src/com/android/launcher3/views/OptionsPopupView.java b/src/com/android/launcher3/views/OptionsPopupView.java
index d558781..349ba9d 100644
--- a/src/com/android/launcher3/views/OptionsPopupView.java
+++ b/src/com/android/launcher3/views/OptionsPopupView.java
@@ -16,6 +16,7 @@
 package com.android.launcher3.views;
 
 import static com.android.launcher3.Utilities.EXTRA_WALLPAPER_FLAVOR;
+import static com.android.launcher3.Utilities.EXTRA_WALLPAPER_LAUNCH_SOURCE;
 import static com.android.launcher3.Utilities.EXTRA_WALLPAPER_OFFSET;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.IGNORE;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_SETTINGS_BUTTON_TAP_OR_LONGPRESS;
@@ -210,7 +211,8 @@
         Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER)
                 .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
                 .putExtra(EXTRA_WALLPAPER_OFFSET,
-                        launcher.getWorkspace().getWallpaperOffsetForCenterPage());
+                        launcher.getWorkspace().getWallpaperOffsetForCenterPage())
+                .putExtra(EXTRA_WALLPAPER_LAUNCH_SOURCE, "app_launched_launcher");
         if (!Utilities.existsStyleWallpapers(launcher)) {
             intent.putExtra(EXTRA_WALLPAPER_FLAVOR, "wallpaper_only");
         } else {