diff --git a/services/core/java/com/android/server/wm/WindowContainer.java b/services/core/java/com/android/server/wm/WindowContainer.java
index 9a9283257b032..a1902bbd6764c 100644
--- a/services/core/java/com/android/server/wm/WindowContainer.java
+++ b/services/core/java/com/android/server/wm/WindowContainer.java
@@ -2476,9 +2476,12 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
 
     boolean prepareForSync(BLASTSyncEngine.TransactionReadyListener waitingListener,
             int waitingId) {
-        boolean willSync = false;
-        if (!isVisible()) {
-            return willSync;
+        boolean willSync = true;
+
+        // If we are invisible, no need to sync, likewise if we are already engaged in a sync,
+        // we can't support overlapping syncs on a single container yet.
+        if (!isVisible() || mWaitingListener != null) {
+            return false;
         }
         mUsingBLASTSyncTransaction = true;
 
diff --git a/services/tests/wmtests/src/com/android/server/wm/TaskOrganizerTests.java b/services/tests/wmtests/src/com/android/server/wm/TaskOrganizerTests.java
index 8019e9df5143e..71c837e2b46ed 100644
--- a/services/tests/wmtests/src/com/android/server/wm/TaskOrganizerTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/TaskOrganizerTests.java
@@ -550,6 +550,9 @@ public class TaskOrganizerTests extends WindowTestsBase {
         final Task task = createTaskInStack(stackController1, 0 /* userId */);
         final ITaskOrganizer organizer = registerMockOrganizer();
 
+        spyOn(task);
+        doReturn(true).when(task).isVisible();
+
         BLASTSyncEngine bse = new BLASTSyncEngine();
 
         BLASTSyncEngine.TransactionReadyListener transactionListener =
@@ -563,6 +566,35 @@ public class TaskOrganizerTests extends WindowTestsBase {
             .transactionReady(anyInt(), any());
     }
 
+    @Test
+    public void testOverlappingBLASTCallback() throws RemoteException {
+        final ActivityStack stackController1 = createTaskStackOnDisplay(mDisplayContent);
+        final Task task = createTaskInStack(stackController1, 0 /* userId */);
+        final ITaskOrganizer organizer = registerMockOrganizer();
+
+        spyOn(task);
+        doReturn(true).when(task).isVisible();
+        final WindowState w = createAppWindow(task, TYPE_APPLICATION, "Enlightened Window");
+        makeWindowVisible(w);
+
+        BLASTSyncEngine bse = new BLASTSyncEngine();
+
+        BLASTSyncEngine.TransactionReadyListener transactionListener =
+            mock(BLASTSyncEngine.TransactionReadyListener.class);
+
+        int id = bse.startSyncSet(transactionListener);
+        assertEquals(true, bse.addToSyncSet(id, task));
+        bse.setReady(id);
+
+        int id2 = bse.startSyncSet(transactionListener);
+        // We should be rejected from the second sync since we are already
+        // in one.
+        assertEquals(false, bse.addToSyncSet(id2, task));
+        w.finishDrawing(null);
+        assertEquals(true, bse.addToSyncSet(id2, task));
+        bse.setReady(id2);
+    }
+
     @Test
     public void testBLASTCallbackWithWindow() {
         final ActivityStack stackController1 = createTaskStackOnDisplay(mDisplayContent);