I use both Manjaro and EndeavourOS, as well as Plasma .6.2.4. The graphic errors occur in both distributions, but only in kpatience. After switching through the virtual desktops, these glitches disappear for a short time, but immediately return.
Manjaro Testing - Wayland.
1 extra/kpat 24.08.3-1 (3.8 MiB 5.5 MiB) [kde-applications kde-
SysInfo
Operating System: Manjaro Linux
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.1
Kernel Version: 6.12.4-1-MANJARO (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 5600G with Radeon Graphics
Memory: 16.1 GB of RAM
Graphics Processor: AMD Radeon Graphics
Product Name: B550M Steel Legend
Hi - it looks like you’re running into this bug, which ultimately relates to a Qt upstream issue: 495703 – Graphical artifacts showing abundantly
Comment #11 there has some specific workarounds that may help in the meantime.
Hope that helps,
2 Likes
THANK YOU @johnandmegh - I have this issue and now a workaround 
/Jaybe