fixes #111221

src/vs/workbench/contrib/extensions/browser/extensionsActions.ts

@@ -186,6 +186,7 @@ export class ActionWithDropDownAction extends ExtensionAction {
 		super(id, label);
 		this.update();
 		this._register(Event.any(...actions.map(a => a.onDidChange))(() => this.update(true)));
+		actions.forEach(a => this._register(a));
 	}
 
 	update(donotUpdateActions?: boolean): void {

src/vs/workbench/contrib/extensions/browser/extensionsList.ts

@@ -223,10 +223,14 @@ export class Renderer implements IPagedRenderer<IExtension, ITemplateData> {
 				});
 			}
 		}, this, data.extensionDisposables);
+	}
 
+	disposeElement(extension: IExtension, index: number, data: ITemplateData): void {
+		data.extensionDisposables = dispose(data.extensionDisposables);
 	}
 
 	disposeTemplate(data: ITemplateData): void {
+		data.extensionDisposables = dispose(data.extensionDisposables);
 		data.disposables = dispose(data.disposables);
 	}
 }