diff --git a/bec_widgets/utils/bec_connector.py b/bec_widgets/utils/bec_connector.py
index 11b106d6..a50fed70 100644
--- a/bec_widgets/utils/bec_connector.py
+++ b/bec_widgets/utils/bec_connector.py
@@ -99,6 +99,9 @@ class BECConnector:
             self, QObject
         ), "BECConnector must be used with a QObject or any qt related class."
 
+        # flag to check if the object was destroyed and its cleanup was called
+        self._destroyed = False
+
         # BEC related connections
         self.bec_dispatcher = BECDispatcher(client=client)
         self.client = self.bec_dispatcher.client if client is None else client
@@ -173,7 +176,9 @@ class BECConnector:
         if not hasattr(self, "cleanup"):
             return
         try:
-            self.cleanup()
+            if not self._destroyed:
+                self.cleanup()
+                self._destroyed = True
         except Exception:
             content = traceback.format_exc()
             logger.info(
diff --git a/bec_widgets/utils/bec_widget.py b/bec_widgets/utils/bec_widget.py
index b7eb1916..35920c18 100644
--- a/bec_widgets/utils/bec_widget.py
+++ b/bec_widgets/utils/bec_widget.py
@@ -112,6 +112,8 @@ class BECWidget(BECConnector):
     def closeEvent(self, event):
         """Wrap the close even to ensure the rpc_register is cleaned up."""
         try:
-            self.cleanup()
+            if not self._destroyed:
+                self.cleanup()
+                self._destroyed = True
         finally:
             super().closeEvent(event)  # pylint: disable=no-member