SUMMARY STEPS TO REPRODUCE 1. Right click on taskbar > more options. 2. In the opacity section, set "opaque". OBSERVED RESULT Taskbar and Kickoff will be opaque, but the system tray applets won't. EXPECTED RESULT SOFTWARE/OS VERSIONS Operating System: Fedora 34 KDE Plasma Version: 5.22.2 KDE Frameworks Version: 5.83.0 Qt Version: 5.15.2 Kernel Version: 5.12.12-300.fc34.x86_64 (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i5-8265U CPU @ 1.60GHz Memory: 15.5 GiB of RAM Graphics Processor: Mesa Intel® UHD Graphics 620 ADDITIONAL INFORMATION I'm using the Breeze default theme.
Created attachment 139698 [details] Kickoff
Created attachment 139699 [details] Battery system tray applet
*** This bug has been marked as a duplicate of bug 439025 ***