There seems to be a bug with the EC which doesn’t switch the thermal limits back from power save when it’s been set.
Ensure you are running a kernel that supports amd-pstate-epp and are using the powersave governor set to balanced_performance. If it sets the platform profile to low-power then it won’t get set back until a power cycle.
More info in this thread
Having said that I have tested ryujinx and had no problems. But am using a more up to date mesa sand kernel in fc39