when the commit happens

sync/signals.py

@@ -59,7 +59,7 @@ def synchronization_notifications(sender, instance, created=False, **kwargs):
     save_model_log_if_possible(instance, signal, created, device_id)
 
     # print(f'*** instance._state.db: {instance._state.db}')
-    notify_impacted_users(instance)
+    transaction.on_commit(lambda: notify_impacted_users(instance))
 
 def notify_impacted_users(instance):
     user_ids = set()