Permabanned
I haven't found out what is causing these problems no but I did write a post about it in the OC UK "Asrock Feedback Thread".
One thing I've also discovered (from another forum) is that on the Taichi the XFR 2.0 option is disabled by default. I have enabled it but it then asks for PDT/TDC/EDC limit values which I have left as is (0). As a result I'm not sure the option is actually doing anything, haven't really noticed a difference so far.
I very much hope that Asrock will sort out their next x370 Taichi bios
Unfortunately I haven't got a clue what PDT, TDC or EDC limit values even are, It might be worth checking Asrock's forum out if they have one, At least so you can find out what settings to add for XFR 2.0.
Asrock may not even release another bio's with the fix you need for months if they're not notified directly.
I never had any faith in brand reporting forms but AMD changed my opinion in recent years, What have you got too lose?