I also have an Asus TUF mobo, and had a similar sounding issue where my system would hard reset or lock up entirely (but normally when under stress). After a LOT of troubleshooting, it turns out it was the Asus AI overclock tuning. After turning that off completely and setting my profile to DOCP II, the issue went away and left me with a stable system. Not sure its the same issue, but worth sharing my experience.
Love it. Pola and Bryson always deliver.