diff --git a/packages/fineui/src/component/treevaluechooser/abstract.treevaluechooser.list.js b/packages/fineui/src/component/treevaluechooser/abstract.treevaluechooser.list.js
index d3afdae79..9c84e13ba 100644
--- a/packages/fineui/src/component/treevaluechooser/abstract.treevaluechooser.list.js
+++ b/packages/fineui/src/component/treevaluechooser/abstract.treevaluechooser.list.js
@@ -31,7 +31,7 @@ export class AbstractListTreeValueChooser extends AbstractTreeValueChooser {
             return;
         }
 
-        doCheck.call(this, [], this.tree.getRoot(), selectedValues);
+        doCheck([], this.tree.getRoot(), selectedValues);
 
         callback({
             items: values(result),
diff --git a/packages/fineui/src/core/wrapper/layout/layout.card.js b/packages/fineui/src/core/wrapper/layout/layout.card.js
index f2f717938..d1247e4e3 100644
--- a/packages/fineui/src/core/wrapper/layout/layout.card.js
+++ b/packages/fineui/src/core/wrapper/layout/layout.card.js
@@ -109,7 +109,10 @@ export class CardLayout extends Layout {
 
         const child = this._children[this._getChildName(cardName)];
         this._deleteCardByName(cardName);
-        child && child._destroy();
+        if (child) {
+            child._destroy();
+            child = null;
+        }
     }
 
     addCardByName(cardName, cardItem) {