diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java
index ac5ff20759016..67ec6cf4304ec 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java
@@ -248,6 +248,9 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
             mCaptionInsetsRect.bottom = mCaptionInsetsRect.top + captionHeight + params.mCaptionY;
             wct.addInsetsSource(mTaskInfo.token,
                     mOwner, 0 /* index */, WindowInsets.Type.captionBar(), mCaptionInsetsRect);
+            wct.addInsetsSource(mTaskInfo.token,
+                    mOwner, 0 /* index */, WindowInsets.Type.mandatorySystemGestures(),
+                    mCaptionInsetsRect);
         } else {
             startT.hide(mCaptionContainerSurface);
         }
@@ -345,6 +348,8 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
         final WindowContainerTransaction wct = mWindowContainerTransactionSupplier.get();
         wct.removeInsetsSource(mTaskInfo.token,
                 mOwner, 0 /* index */, WindowInsets.Type.captionBar());
+        wct.removeInsetsSource(mTaskInfo.token,
+                mOwner, 0 /* index */, WindowInsets.Type.mandatorySystemGestures());
         mTaskOrganizer.applyTransaction(wct);
     }
 
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/WindowDecorationTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/WindowDecorationTests.java
index 5a2326b9c3936..f941e9501a3fe 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/WindowDecorationTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/WindowDecorationTests.java
@@ -316,7 +316,8 @@ public class WindowDecorationTests extends ShellTestCase {
         releaseOrder.verify(t).remove(captionContainerSurface);
         releaseOrder.verify(t).remove(decorContainerSurface);
         releaseOrder.verify(t).apply();
-        verify(mMockWindowContainerTransaction)
+        // Expect to remove two insets sources, the caption insets and the mandatory gesture insets.
+        verify(mMockWindowContainerTransaction, Mockito.times(2))
                 .removeInsetsSource(eq(taskInfo.token), any(), anyInt(), anyInt());
     }