What kernels did you try? Be sure to try something that is not on 6.4. Generally we suggest trying the LTS kernel, which is well-supported and runs the 6.1 version.
Another thing that might be worth a shot since you have a very new GPU would be to switch to the upstream experimental build of mesa.
https://wiki.archlinux.org/title/AMDGPU#Experimental
If it does not help I would suggest switching back because there is always the possibility the bleeding edge stuff can introduce new bugs.