Switching to DRI3 fixes the problem for me (intel gpu).
https://www.kubuntuforums.net/showthread.php?69984-FIX-for-flickering-flashing-panel-on-Intel-gpu
Switching to DRI3 fixes the problem for me (intel gpu).
https:/ /www.kubuntufor ums.net/ showthread. php?69984- FIX-for- flickering- flashing- panel-on- Intel-gpu