diff --git a/packages/designer/src/designer/setting/setting-field.ts b/packages/designer/src/designer/setting/setting-field.ts
index 2f922a5a0..2267fcef9 100644
--- a/packages/designer/src/designer/setting/setting-field.ts
+++ b/packages/designer/src/designer/setting/setting-field.ts
@@ -118,7 +118,6 @@ export class SettingField extends SettingPropEntry implements SettingEntry {
 
   purge() {
     this.disposeItems();
-    this.parent = null as any;
   }
 
   // ======= compatibles for vision ======
diff --git a/packages/designer/src/designer/setting/setting-top-entry.ts b/packages/designer/src/designer/setting/setting-top-entry.ts
index b7074f24f..ab09d355c 100644
--- a/packages/designer/src/designer/setting/setting-top-entry.ts
+++ b/packages/designer/src/designer/setting/setting-top-entry.ts
@@ -204,6 +204,7 @@ export class SettingTopEntry implements SettingEntry {
 
   purge() {
     this.disposeItems();
+    this._settingFieldMap = {};
     this.emitter.removeAllListeners();
   }
 
diff --git a/packages/designer/src/document/node/node.ts b/packages/designer/src/document/node/node.ts
index 4ea6e5f52..74ff0434a 100644
--- a/packages/designer/src/document/node/node.ts
+++ b/packages/designer/src/document/node/node.ts
@@ -770,6 +770,7 @@ export class Node<Schema extends NodeSchema = NodeSchema> {
     this.purged = true;
     this.autoruns?.forEach((dispose) => dispose());
     this.props.purge();
+    this.settingEntry.purge();
     // this.document.destroyNode(this);
   }
 
diff --git a/packages/react-simulator-renderer/src/index.ts b/packages/react-simulator-renderer/src/index.ts
index 3a8872665..b88a94c05 100644
--- a/packages/react-simulator-renderer/src/index.ts
+++ b/packages/react-simulator-renderer/src/index.ts
@@ -4,4 +4,12 @@ if (typeof window !== 'undefined') {
   (window as any).SimulatorRenderer = renderer;
 }
 
+window.addEventListener('beforeunload', () => {
+  (window as any).LCSimulatorHost = null;
+  // @ts-ignore
+  renderer.dispose?.();
+  (window as any).SimulatorRenderer = null;
+  (window as any).ReactDOM.unmountComponentAtNode(document.getElementById('app'));
+});
+
 export default renderer;