I have been running amdgpu for like 10+ years with no issues between 3 cards, I'm even running their bleeding edge card (9070xt) no issues. what kernel version are you on ?
Discussion
I'm running Archlinux with kernel 6.15.4 and this issue persists even after I replaced the original 6700XT with a new 6700XT. Here is a mile long thread about the issue on the freedesktop gitlab if you are interested in the gory details: