diff --git a/packages/SystemUI/src/com/android/systemui/accessibility/WindowMagnificationController.java b/packages/SystemUI/src/com/android/systemui/accessibility/WindowMagnificationController.java
index fcb090a76d5b1..717c7156f9174 100644
--- a/packages/SystemUI/src/com/android/systemui/accessibility/WindowMagnificationController.java
+++ b/packages/SystemUI/src/com/android/systemui/accessibility/WindowMagnificationController.java
@@ -66,6 +66,7 @@ import com.android.systemui.shared.system.WindowManagerWrapper;
 
 import java.io.PrintWriter;
 import java.text.NumberFormat;
+import java.util.Collections;
 import java.util.Locale;
 
 /**
@@ -178,7 +179,13 @@ class WindowMagnificationController implements View.OnTouchListener, SurfaceHold
         // Initialize listeners.
         mMirrorViewRunnable = () -> {
             if (mMirrorView != null) {
+                final Rect oldViewBounds = new Rect(mMirrorViewBounds);
                 mMirrorView.getBoundsOnScreen(mMirrorViewBounds);
+                if (oldViewBounds.width() != mMirrorViewBounds.width()
+                        || oldViewBounds.height() != mMirrorViewBounds.height()) {
+                    mMirrorView.setSystemGestureExclusionRects(Collections.singletonList(
+                            new Rect(0, 0, mMirrorViewBounds.width(), mMirrorViewBounds.height())));
+                }
                 updateSystemUIStateIfNeeded();
                 mWindowMagnifierCallback.onWindowMagnifierBoundsChanged(
                         mDisplayId, mMirrorViewBounds);
@@ -269,6 +276,7 @@ class WindowMagnificationController implements View.OnTouchListener, SurfaceHold
         if (mMirrorWindowControl != null) {
             mMirrorWindowControl.destroyControl();
         }
+        mMirrorViewBounds.setEmpty();
         updateSystemUIStateIfNeeded();
     }
 
diff --git a/packages/SystemUI/tests/src/com/android/systemui/accessibility/WindowMagnificationControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/accessibility/WindowMagnificationControllerTest.java
index ad99e4d5a7727..f62069d35d350 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/accessibility/WindowMagnificationControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/accessibility/WindowMagnificationControllerTest.java
@@ -77,6 +77,8 @@ import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.mockito.MockitoAnnotations;
 
+import java.util.List;
+
 @LargeTest
 @RunWith(AndroidTestingRunner.class)
 public class WindowMagnificationControllerTest extends SysuiTestCase {
@@ -151,6 +153,19 @@ public class WindowMagnificationControllerTest extends SysuiTestCase {
                 eq(mContext.getDisplayId()), any(Rect.class));
     }
 
+    @Test
+    public void enableWindowMagnification_systemGestureExclusionRectsIsSet() {
+        mInstrumentation.runOnMainSync(() -> {
+            mWindowMagnificationController.enableWindowMagnification(Float.NaN, Float.NaN,
+                    Float.NaN);
+        });
+        // Wait for Rects updated.
+        waitForIdleSync();
+
+        List<Rect> rects = mWindowManager.getAttachedView().getSystemGestureExclusionRects();
+        assertFalse(rects.isEmpty());
+    }
+
     @Test
     public void deleteWindowMagnification_destroyControl() {
         mInstrumentation.runOnMainSync(() -> {