SUMMARY Using an nvidia wayland session, kicker does not render submenus properly STEPS TO REPRODUCE 1. Start a nvidia wayland session 2. Open kicker 3. Hover over a sub menu (e.g. Administration) 4. Hover over a different sub menu (e.g. Office) OBSERVED RESULT The first sub menu will still be rendered, sometimes "glitchy" with weird transparency and offsets. EXPECTED RESULT The second sub menu will be rendered without rendering artifacts.
The Nvidia driver had some huge changes and how it interacts with KWin. Please try again and file new bugs as appropriate thank you!