fixes #67228

src/vs/workbench/parts/debug/electron-browser/callStackView.ts

@@ -227,6 +227,10 @@ export class CallStackView extends ViewletPanel {
 		this.tree.layout(height, width);
 	}
 
+	focus(): void {
+		this.tree.domFocus();
+	}
+
 	private updateTreeSelection(): void {
 		if (!this.tree || this.tree.visibleNodeCount === 0) {
 			// Tree not initialized yet

src/vs/workbench/parts/debug/electron-browser/variablesView.ts

@@ -121,6 +121,10 @@ export class VariablesView extends ViewletPanel {
 		this.tree.layout(width, height);
 	}
 
+	focus(): void {
+		this.tree.domFocus();
+	}
+
 	private onMouseDblClick(e: ITreeMouseEvent<IExpression | IScope>): void {
 		const session = this.debugService.getViewModel().focusedSession;
 		if (e.element instanceof Variable && session.capabilities.supportsSetVariable) {

src/vs/workbench/parts/debug/electron-browser/watchExpressionsView.ts

@@ -117,6 +117,10 @@ export class WatchExpressionsView extends ViewletPanel {
 		this.tree.layout(height, width);
 	}
 
+	focus(): void {
+		this.tree.domFocus();
+	}
+
 	private onMouseDblClick(e: ITreeMouseEvent<IExpression>): void {
 		if ((e.browserEvent.target as HTMLElement).className.indexOf('twistie') >= 0) {
 			// Ignore double click events on twistie