Because of Kernel 5.2.1-1 on AMD hardware - weird graphic glitches I did a BIOS update but no improvements. So I did some further testing and created a fresh KDE user and surprisingly no issue on the fresh profile (with the problematic kernels mentioned above) Also noticed some boot errors and shutdown errors when using the problematic kernels.
Fixed the boot and shutdown errors but still no improvements.
When searching through the forum I found this: Screen flashing and black bar flashing on AMD RX 580 with 75hz monitor and because I have the exact same setup I tried changing to 60hz and boom everything works fine now. Thanks for all the people helped.
P.S First I had to switch to 50hz then I could switch to 60hz otherwise 60hz didnt work too.
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