STEPS TO REPRODUCE 1. start Wayland session 2. open system settings > workspace behavior > virtual desktops 3. set virtual desktops (I use 4 VD, 2 rows) 4. check "Show on-screen display when switching" and "Show desktop layout indicators" options 5. click on "Apply" button 6. switch between virtual desktops OBSERVED RESULT a shadowless OSD appears. EXPECTED RESULT OSD has shadow SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.17.90 KDE Frameworks Version: 5.66.0 Qt Version: 5.14.0 ADDITIONAL INFORMATION also reproducible on Neon unstable edition
*** This bug has been marked as a duplicate of bug 416640 ***