fix #65475

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

@@ -62,7 +62,7 @@ export class CustomTreeViewPanel extends ViewletPanel {
 		this.treeView = treeView;
 		this.treeView.onDidChangeActions(() => this.updateActions(), this, this.disposables);
 		this.disposables.push(toDisposable(() => this.treeView.setVisibility(false)));
-		this.onDidChangeBodyVisibility(() => this.updateTreeVisibility());
+		this.disposables.push(this.onDidChangeBodyVisibility(() => this.updateTreeVisibility()));
 		this.updateTreeVisibility();
 	}
 

src/vs/workbench/parts/outline/electron-browser/outlinePanel.ts

@@ -50,7 +50,7 @@ import { IViewletViewOptions } from 'vs/workbench/browser/parts/views/viewsViewl
 import { CollapseAction } from 'vs/workbench/browser/viewlet';
 import { IViewsService } from 'vs/workbench/common/views';
 import { ACTIVE_GROUP, IEditorService, SIDE_GROUP } from 'vs/workbench/services/editor/common/editorService';
-import { OutlineController, OutlineDataSource, OutlineItemComparator, OutlineItemCompareType, OutlineItemFilter, OutlineRenderer, OutlineTreeState } from '../../../../editor/contrib/documentSymbols/outlineTree';
+import { OutlineController, OutlineDataSource, OutlineItemComparator, OutlineItemCompareType, OutlineItemFilter, OutlineRenderer, OutlineTreeState } from 'vs/editor/contrib/documentSymbols/outlineTree';
 import { OutlineConfigKeys, OutlineViewFiltered, OutlineViewFocused, OutlineViewId } from './outline';
 
 class RequestState {
@@ -372,6 +372,16 @@ export class OutlinePanel extends ViewletPanel {
 				dom.toggleClass(this._domNode, 'no-icons', !this._configurationService.getValue(OutlineConfigKeys.icons));
 			}
 		}));
+
+		this.disposables.push(this.onDidChangeBodyVisibility(visible => {
+			if (visible && !this._requestOracle) {
+				this._requestOracle = this._instantiationService.createInstance(RequestOracle, (editor, event) => this._doUpdate(editor, event), DocumentSymbolProviderRegistry);
+			} else if (!visible) {
+				dispose(this._requestOracle);
+				this._requestOracle = undefined;
+				this._doUpdate(undefined, undefined);
+			}
+		}));
 	}
 
 	protected layoutBody(height: number): void {
@@ -382,25 +392,6 @@ export class OutlinePanel extends ViewletPanel {
 		}
 	}
 
-	setVisible(visible: boolean): void {
-		if (visible && this.isExpanded() && !this._requestOracle) {
-			// workaround for https://github.com/Microsoft/vscode/issues/60011
-			this.setExpanded(true);
-		}
-		super.setVisible(visible);
-	}
-
-	setExpanded(expanded: boolean): boolean {
-		if (expanded) {
-			this._requestOracle = this._requestOracle || this._instantiationService.createInstance(RequestOracle, (editor, event) => this._doUpdate(editor, event).then(undefined, onUnexpectedError), DocumentSymbolProviderRegistry);
-		} else {
-			dispose(this._requestOracle);
-			this._requestOracle = undefined;
-			this._doUpdate(undefined, undefined);
-		}
-		return super.setExpanded(expanded);
-	}
-
 	getActions(): IAction[] {
 		return [
 			new Action('collapse', localize('collapse', "Collapse All"), 'explorer-action collapse-explorer', true, () => {