diff --git a/quickstep/src/com/android/launcher3/taskbar/FallbackTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/FallbackTaskbarUIController.java
index 90c035f..f1e6747 100644
--- a/quickstep/src/com/android/launcher3/taskbar/FallbackTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/FallbackTaskbarUIController.java
@@ -60,6 +60,7 @@
 
     @Override
     protected void onDestroy() {
+        super.onDestroy();
         mRecentsActivity.setTaskbarUIController(null);
         mRecentsActivity.getStateManager().removeStateListener(mStateListener);
     }
diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index 7d23439..2622700 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -99,6 +99,7 @@
 
     @Override
     protected void onDestroy() {
+        super.onDestroy();
         onLauncherResumedOrPaused(false);
         mTaskbarLauncherStateController.onDestroy();
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
index f713dca..f6bc785 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
@@ -18,6 +18,8 @@
 import android.graphics.Rect;
 import android.view.View;
 
+import androidx.annotation.CallSuper;
+
 import com.android.launcher3.model.data.ItemInfoWithIcon;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 
@@ -33,11 +35,15 @@
     // Initialized in init.
     protected TaskbarControllers mControllers;
 
+    @CallSuper
     protected void init(TaskbarControllers taskbarControllers) {
         mControllers = taskbarControllers;
     }
 
-    protected void onDestroy() { }
+    @CallSuper
+    protected void onDestroy() {
+        mControllers = null;
+    }
 
     protected boolean isTaskbarTouchable() {
         return true;
diff --git a/quickstep/src/com/android/quickstep/SystemUiProxy.java b/quickstep/src/com/android/quickstep/SystemUiProxy.java
index a9fef41..6c623bc 100644
--- a/quickstep/src/com/android/quickstep/SystemUiProxy.java
+++ b/quickstep/src/com/android/quickstep/SystemUiProxy.java
@@ -599,11 +599,11 @@
         }
     }
 
-    public void startShortcut(String packageName, String shortcutId, int stage, int position,
+    public void startShortcut(String packageName, String shortcutId, int position,
             Bundle options, UserHandle user) {
         if (mSplitScreen != null) {
             try {
-                mSplitScreen.startShortcut(packageName, shortcutId, stage, position, options,
+                mSplitScreen.startShortcut(packageName, shortcutId, position, options,
                         user);
             } catch (RemoteException e) {
                 Log.w(TAG, "Failed call startShortcut");
@@ -611,11 +611,11 @@
         }
     }
 
-    public void startIntent(PendingIntent intent, Intent fillInIntent, int stage, int position,
+    public void startIntent(PendingIntent intent, Intent fillInIntent, int position,
             Bundle options) {
         if (mSplitScreen != null) {
             try {
-                mSplitScreen.startIntent(intent, fillInIntent, stage, position, options);
+                mSplitScreen.startIntent(intent, fillInIntent, position, options);
             } catch (RemoteException e) {
                 Log.w(TAG, "Failed call startIntent");
             }
diff --git a/quickstep/src/com/android/quickstep/views/TaskThumbnailView.java b/quickstep/src/com/android/quickstep/views/TaskThumbnailView.java
index d91669a..da92551 100644
--- a/quickstep/src/com/android/quickstep/views/TaskThumbnailView.java
+++ b/quickstep/src/com/android/quickstep/views/TaskThumbnailView.java
@@ -19,6 +19,7 @@
 import static android.view.WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS;
 import static android.view.WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS;
 
+import static com.android.launcher3.Utilities.comp;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_QUICKSTEP_LIVE_TILE;
 import static com.android.systemui.shared.system.WindowManagerWrapper.WINDOWING_MODE_FULLSCREEN;
 
@@ -290,8 +291,17 @@
             float cornerRadius) {
         if (ENABLE_QUICKSTEP_LIVE_TILE.get()) {
             if (mTask != null && getTaskView().isRunningTask() && !getTaskView().showScreenshot()) {
-                canvas.drawRoundRect(x, y, width, height, cornerRadius, cornerRadius, mClearPaint);
-                canvas.drawRoundRect(x, y, width, height, cornerRadius, cornerRadius,
+                // TODO(b/189265196): Temporary fix to align the surface with the cutout perfectly.
+                // Round up only when the live tile task is displayed in Overview.
+                float rounding = comp(mFullscreenParams.mFullscreenProgress);
+                float left = x + rounding / 2;
+                float top = y + rounding / 2;
+                float right = width - rounding;
+                float bottom = height - rounding;
+
+                canvas.drawRoundRect(left, top, right, bottom, cornerRadius, cornerRadius,
+                        mClearPaint);
+                canvas.drawRoundRect(left, top, right, bottom, cornerRadius, cornerRadius,
                         mDimmingPaintAfterClearing);
                 return;
             }
diff --git a/quickstep/src/com/android/quickstep/views/TaskView.java b/quickstep/src/com/android/quickstep/views/TaskView.java
index f7f5efc..cca9ecf 100644
--- a/quickstep/src/com/android/quickstep/views/TaskView.java
+++ b/quickstep/src/com/android/quickstep/views/TaskView.java
@@ -1531,6 +1531,7 @@
         private final float mCornerRadius;
         private final float mWindowCornerRadius;
 
+        public float mFullscreenProgress;
         public RectF mCurrentDrawnInsets = new RectF();
         public float mCurrentDrawnCornerRadius;
         /** The current scale we apply to the thumbnail to adjust for new left/right insets. */
@@ -1548,6 +1549,8 @@
          */
         public void setProgress(float fullscreenProgress, float parentScale, float taskViewScale,
                 int previewWidth, DeviceProfile dp, PreviewPositionHelper pph) {
+            mFullscreenProgress = fullscreenProgress;
+
             RectF insets = pph.getInsetsToDrawInFullscreen(dp);
 
             float currentInsetsLeft = insets.left * fullscreenProgress;
diff --git a/src/com/android/launcher3/views/Snackbar.java b/src/com/android/launcher3/views/Snackbar.java
index 49fcd2e..f945819 100644
--- a/src/com/android/launcher3/views/Snackbar.java
+++ b/src/com/android/launcher3/views/Snackbar.java
@@ -28,8 +28,9 @@
 import android.view.MotionEvent;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.AbstractFloatingView;
-import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.R;
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.compat.AccessibilityManagerCompat;
@@ -44,7 +45,7 @@
     private static final long HIDE_DURATION_MS = 180;
     private static final int TIMEOUT_DURATION_MS = 4000;
 
-    private final BaseDraggingActivity mActivity;
+    private final ActivityContext mActivity;
     private Runnable mOnDismissed;
 
     public Snackbar(Context context, AttributeSet attrs) {
@@ -53,12 +54,19 @@
 
     public Snackbar(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
-        mActivity = BaseDraggingActivity.fromContext(context);
+        mActivity = ActivityContext.lookupContext(context);
         inflate(context, R.layout.snackbar, this);
     }
 
-    public static void show(BaseDraggingActivity activity, int labelStringResId,
-            int actionStringResId, Runnable onDismissed, Runnable onActionClicked) {
+    /** Show a snackbar with just a label. */
+    public static <T extends Context & ActivityContext> void show(T activity, int labelStringRedId,
+            Runnable onDismissed) {
+        show(activity, labelStringRedId, NO_ID, onDismissed, null);
+    }
+
+    /** Show a snackbar with a label and action. */
+    public static <T extends Context & ActivityContext> void show(T activity, int labelStringResId,
+            int actionStringResId, Runnable onDismissed, @Nullable Runnable onActionClicked) {
         closeOpenViews(activity, true, TYPE_SNACKBAR);
         Snackbar snackbar = new Snackbar(activity, null);
         // Set some properties here since inflated xml only contains the children.
@@ -87,13 +95,30 @@
         params.setMargins(0, 0, 0, marginBottom + insets.bottom);
 
         TextView labelView = snackbar.findViewById(R.id.label);
-        TextView actionView = snackbar.findViewById(R.id.action);
         String labelText = res.getString(labelStringResId);
-        String actionText = res.getString(actionStringResId);
-        int totalContentWidth = (int) (labelView.getPaint().measureText(labelText)
-                + actionView.getPaint().measureText(actionText))
+        labelView.setText(labelText);
+
+        TextView actionView = snackbar.findViewById(R.id.action);
+        float actionWidth;
+        if (actionStringResId != NO_ID) {
+            String actionText = res.getString(actionStringResId);
+            actionWidth = actionView.getPaint().measureText(actionText)
+                    + actionView.getPaddingRight() + actionView.getPaddingLeft();
+            actionView.setText(actionText);
+            actionView.setOnClickListener(v -> {
+                if (onActionClicked != null) {
+                    onActionClicked.run();
+                }
+                snackbar.mOnDismissed = null;
+                snackbar.close(true);
+            });
+        } else {
+            actionWidth = 0;
+            actionView.setVisibility(GONE);
+        }
+
+        int totalContentWidth = (int) (labelView.getPaint().measureText(labelText) + actionWidth)
                 + labelView.getPaddingRight() + labelView.getPaddingLeft()
-                + actionView.getPaddingRight() + actionView.getPaddingLeft()
                 + padding * 2;
         if (totalContentWidth > params.width) {
             // The text doesn't fit in our standard width so update width to accommodate.
@@ -113,17 +138,8 @@
                 params.width = maxWidth;
             }
         }
-        labelView.setText(labelText);
-        actionView.setText(actionText);
-        actionView.setOnClickListener(v -> {
-            if (onActionClicked != null) {
-                onActionClicked.run();
-            }
-            snackbar.mOnDismissed = null;
-            snackbar.close(true);
-        });
-        snackbar.mOnDismissed = onDismissed;
 
+        snackbar.mOnDismissed = onDismissed;
         snackbar.setAlpha(0);
         snackbar.setScaleX(0.8f);
         snackbar.setScaleY(0.8f);