diff --git a/packages/amis-core/src/utils/renderer-event.ts b/packages/amis-core/src/utils/renderer-event.ts
index 42346da4d..5128e5368 100644
--- a/packages/amis-core/src/utils/renderer-event.ts
+++ b/packages/amis-core/src/utils/renderer-event.ts
@@ -366,6 +366,7 @@ export async function dispatchGlobalEvent(eventName: string, data: any) {
     eventName,
     data
   });
+  bc.close();
 }
 
 export const getRendererEventListeners = () => {