diff --git a/src/one_dragon_qt/widgets/setting_card/expand_setting_card_group.py b/src/one_dragon_qt/widgets/setting_card/expand_setting_card_group.py
index d580acd..502122f 100644
--- a/src/one_dragon_qt/widgets/setting_card/expand_setting_card_group.py
+++ b/src/one_dragon_qt/widgets/setting_card/expand_setting_card_group.py
@@ -5,6 +5,7 @@
 from PySide6.QtWidgets import QWidget
 from qfluentwidgets import ExpandSettingCard, FluentIcon
 from qfluentwidgets.components.settings.expand_setting_card import GroupSeparator
+from shiboken6 import isValid
 
 from one_dragon.utils.i18_utils import gt
 
@@ -72,8 +73,12 @@ def eventFilter(self, arg__1: QObject, arg__2: QEvent) -> bool:
 
     def _update_separators(self) -> None:
         """根据卡片可见性更新分隔线：仅当当前卡片可见且前面存在可见卡片时才显示分隔线"""
+        if not isValid(self):
+            return
         has_visible_before = False
         for card, sep in self._card_sep_pairs:
+            if not isValid(card):
+                continue
             if sep is not None:
                 sep.setVisible(card.isVisible() and has_visible_before)
             if card.isVisible():