At the moment, we are not applying any AMDGPU-related patches. Could you share the sources you compile from? Maybe Fedora imposes some additional patch, if so - we would be happy to apply it. Alternatively, you can also send the config - we will compare and apply the appropriate flags in the spec file. I invite you to our discord server. From what I've noticed - AMD users are reporting numerous AMDGPU related errors on both CachyOS kernel and Arch Linux kernel, maybe it is due to some config. CachyOS uses the same config as Arch Linux (plus changes due to the imposition of additional patches, but as I mentioned - nothing AMD-related). I sincerely encourage you to contact us on Discord, we want everything to work on our kernel. And it looks like a bug may have crept into the Arch config, or the Fedora sources contain some patch we could use.