diff --git a/bec_widgets/widgets/containers/main_window/addons/notification_center/notification_banner.py b/bec_widgets/widgets/containers/main_window/addons/notification_center/notification_banner.py
index bb32393a..5017f97b 100644
--- a/bec_widgets/widgets/containers/main_window/addons/notification_center/notification_banner.py
+++ b/bec_widgets/widgets/containers/main_window/addons/notification_center/notification_banner.py
@@ -475,6 +475,8 @@ class NotificationToast(QFrame):
     # Event Filters
     ########################################
     def eventFilter(self, watched, event):
+        if not isinstance(event, QtCore.QEvent):
+            return False
         # timestamp label → toggle absolute time
         if watched is self.time_lbl:
             if event.type() == QtCore.QEvent.Enter and not self._showing_absolute:
@@ -894,6 +896,8 @@ class NotificationCentre(QScrollArea):
         self.setFixedHeight(min(content_h, avail))
 
     def eventFilter(self, watched, event):
+        if not isinstance(event, QtCore.QEvent):
+            return False
         if watched is self.parent() and event.type() == QtCore.QEvent.Resize:
             self._adjust_height()
         return super().eventFilter(watched, event)