Fix #19189

src/vs/workbench/parts/preferences/browser/preferencesWidgets.ts

@@ -80,6 +80,7 @@ export class SettingsGroupTitleWidget extends Widget implements IViewZone {
 		this._afterLineNumber = this.settingsGroup.range.startLineNumber - 2;
 		this.editor.changeViewZones(accessor => {
 			this.id = accessor.addZone(this);
+			this.layout();
 		});
 	}
 
@@ -98,7 +99,7 @@ export class SettingsGroupTitleWidget extends Widget implements IViewZone {
 	private layout(): void {
 		const configuration = this.editor.getConfiguration();
 		const layoutInfo = this.editor.getLayoutInfo();
-		this.titleContainer.style.width = layoutInfo.contentWidth - layoutInfo.verticalScrollbarWidth + 'px';
+		this._domNode.style.width = layoutInfo.contentWidth - layoutInfo.verticalScrollbarWidth + 'px';
 		this.titleContainer.style.lineHeight = configuration.lineHeight + 3 + 'px';
 		this.titleContainer.style.fontSize = configuration.fontInfo.fontSize + 'px';
 		const iconSize = this.getIconSize();