Created attachment 115996 [details] screenshot STEPS TO REPRODUCE 1. start Wayland session, open system settings, click hamburger button, select "configure" 2. select "icon view", click "ok" button 3. click "application style", "window decorations" section OBSERVED RESULT kcm is empty, see the screenshot. EXPECTED RESULT kcm works correctly SOFTWARE VERSIONS neon dev unstable KDE Plasma Version: 5.14.80 KDE Frameworks Version: 5.52 Qt Version: 5.11.2 ADDITIONAL INFORMATION it's not reproducible on Wayland with side bar view nor on X11.
*** This bug has been marked as a duplicate of bug 390112 ***