Not 100% sure if it is the same issue as you linked to, but I have an early Ryzen 7 1700 that has a hardware error (google “ryzen performance marginality” to find info about it) causing it not to work properly with linux. I never bothered to RMA my CPU. I’ve made it kinda work anyways, by disabling cool and quiet or whatever it is called, and set a fixed overclock to compensate for the lack of turbo after that. The idea is that the CPU should always run at a fixed clock speed instead of clocking down to save power when idle. Haven’t had any issues with this CPU for a while now after I did that.
BTW I upgraded my desktop with a 3900x and put the 1700 in a server. Never had any issues with the 3900x on linux, so getting a newer generation ryzen for you PC second hand or something might just fix it as well.