diff --git a/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java b/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java
index b16b71b3e5585..9d9c5a678bafe 100644
--- a/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java
+++ b/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java
@@ -230,7 +230,10 @@ public class PipManager implements BasePipManager, PipTaskOrganizer.PipTransitio
 
         @Override
         public void onAspectRatioChanged(float aspectRatio) {
-            mHandler.post(() -> mPipBoundsHandler.onAspectRatioChanged(aspectRatio));
+            mHandler.post(() -> {
+                mPipBoundsHandler.onAspectRatioChanged(aspectRatio);
+                mTouchHandler.onAspectRatioChanged();
+            });
         }
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/pip/phone/PipResizeGestureHandler.java b/packages/SystemUI/src/com/android/systemui/pip/phone/PipResizeGestureHandler.java
index 40699568aee3d..ef73aa7cbbfe7 100644
--- a/packages/SystemUI/src/com/android/systemui/pip/phone/PipResizeGestureHandler.java
+++ b/packages/SystemUI/src/com/android/systemui/pip/phone/PipResizeGestureHandler.java
@@ -364,6 +364,10 @@ public class PipResizeGestureHandler {
         mUserResizeBounds.set(bounds);
     }
 
+    void invalidateUserResizeBounds() {
+        mUserResizeBounds.setEmpty();
+    }
+
     Rect getUserResizeBounds() {
         return mUserResizeBounds;
     }
diff --git a/packages/SystemUI/src/com/android/systemui/pip/phone/PipTouchHandler.java b/packages/SystemUI/src/com/android/systemui/pip/phone/PipTouchHandler.java
index 7c1c2f83a2589..0127ff310b782 100644
--- a/packages/SystemUI/src/com/android/systemui/pip/phone/PipTouchHandler.java
+++ b/packages/SystemUI/src/com/android/systemui/pip/phone/PipTouchHandler.java
@@ -422,8 +422,21 @@ public class PipTouchHandler {
         }
     }
 
+    /**
+     * Responds to IPinnedStackListener on resetting aspect ratio for the pinned window.
+     */
+    public void onAspectRatioChanged() {
+        mPipResizeGestureHandler.invalidateUserResizeBounds();
+    }
+
     public void onMovementBoundsChanged(Rect insetBounds, Rect normalBounds, Rect curBounds,
             boolean fromImeAdjustment, boolean fromShelfAdjustment, int displayRotation) {
+        // Set the user resized bounds equal to the new normal bounds in case they were
+        // invalidated (e.g. by an aspect ratio change).
+        if (mPipResizeGestureHandler.getUserResizeBounds().isEmpty()) {
+            mPipResizeGestureHandler.setUserResizeBounds(normalBounds);
+        }
+
         final int bottomOffset = mIsImeShowing ? mImeHeight : 0;
         final boolean fromDisplayRotationChanged = (mDisplayRotation != displayRotation);
         if (fromDisplayRotationChanged) {