I have an Asrock X870e Nova motherboard, with a 5G ethernet port driver by the Realtek 8169. Apparently this kernel module/chip has been a bit of a pain. I found one thread for support on the Arch linux forums (https://bbs.archlinux.org/viewtopic.php?id=300278) and the fix seems to be to notify maintainers there's a problem. I don't know what else you need from me or I can provide.