Getting the same artifacts but I also had them during SU6 beta
Sure it is… Adrenalin is upgrading drivers for the sim to natively use the most current version.
Then more than likely the FSR4 issue has not been resolved yet as MS/Asobo indicated previously they are collaborating with AMD toward a fix.
You are 100% correct - I was just a little too quick on the trigger 
and I have adjusted my response accordingly above.