Window control buttons remain undimmed / white in previews

When opening something as a preview or opening a task, the background gets dimmed. However, since the latest update, the window control buttons (minimize, maximize, close) in the top-right corner retain their bright background and are not dimmed like the rest of the window.

System info:

Capacities v1.71.24; none none; Windows v10; Chrome v148.0.7778.280 (WebKit v537.36); Desktop (Electron); 9.10.2026, 15:36:51; de (Europe/Berlin, UTC+2); Memory: 114,31 MB / 4 GB; Storage: 330,06 MB / 35,77 GB; Portal: reachable; S3: reachable; Dead Workers: none