diff --git a/apps/comments/src/comments-activity-tab.ts b/apps/comments/src/comments-activity-tab.ts
index b738242cf574c..88c62447fd026 100644
--- a/apps/comments/src/comments-activity-tab.ts
+++ b/apps/comments/src/comments-activity-tab.ts
@@ -38,6 +38,7 @@ export function registerCommentsPlugins() {
 		unmount: () => {
 			// destroy previous instance if available
 			app?.unmount()
+			app = undefined
 		},
 	})