Fix #96453

src/vs/workbench/browser/parts/views/viewPaneContainer.ts

@@ -878,8 +878,8 @@ export class ViewPaneContainer extends Component implements IViewPaneContainer {
 		}));
 
 		this._register(this.onDidSashChange(() => this.saveViewSizes()));
-		this.viewContainerModel.onDidAddVisibleViewDescriptors(added => this.onDidAddViewDescriptors(added));
-		this.viewContainerModel.onDidRemoveVisibleViewDescriptors(removed => this.onDidRemoveViewDescriptors(removed));
+		this._register(this.viewContainerModel.onDidAddVisibleViewDescriptors(added => this.onDidAddViewDescriptors(added)));
+		this._register(this.viewContainerModel.onDidRemoveVisibleViewDescriptors(removed => this.onDidRemoveViewDescriptors(removed)));
 		const addedViews: IAddedViewDescriptorRef[] = this.viewContainerModel.visibleViewDescriptors.map((viewDescriptor, index) => {
 			const size = this.viewContainerModel.getSize(viewDescriptor.id);
 			const collapsed = this.viewContainerModel.isCollapsed(viewDescriptor.id);