Fix #46307

src/vs/workbench/parts/markers/electron-browser/markersPanel.ts

@@ -204,7 +204,10 @@ export class MarkersPanel extends Panel {
 				ariaLabel: Messages.MARKERS_PANEL_ARIA_LABEL_PROBLEMS_TREE
 			});
 
-		Constants.MarkerFocusContextKey.bindTo(this.tree.contextKeyService);
+		const markerFocusContextKey = Constants.MarkerFocusContextKey.bindTo(this.tree.contextKeyService);
+		this._register(this.tree.onDidChangeFocus((e: { focus: any }) => markerFocusContextKey.set(e.focus instanceof Marker)));
+		const focusTracker = this._register(dom.trackFocus(this.tree.getHTMLElement()));
+		this._register(focusTracker.onDidBlur(() => markerFocusContextKey.set(false)));
 
 		const markersNavigator = this._register(new TreeResourceNavigator(this.tree, { openOnFocus: true }));
 		this._register(debounceEvent(markersNavigator.openResource, (last, event) => event, 75, true)(options => {