Graphical Issues in BIOS with new 120Hz 2.8k Display on AMD Ryzen 7040

I love the new Display, but there is one issue that is quite annoying.
When I boot the laptop and as long as I am not into the OS there are heavy graphical artefacts and the content is flickering around (get’s shown on different areas of the screen). This happens in the BIOS on the loading screen of the OS and so on. Luckily as soon as I am in an Operating System those graphical artefacts stop (With windows completely, in Gnome just very selden).

Two things:

I am using arch linux, but this should have no effect on the graphical output of the BIOS no?
I double checked the connection on the mainboard and the display cable, here seems to be no issue (and the display works fine when the OS is loaded).

Thank you for help!