Herbs Still Train Stat Potentials
Herbs can still be used to train potentials despite that this issue was supposed to be fixed for pre21.
Method:
-Raise stat to one below potential (20/21).
-Consume a large amount of the appropriate herb (20-30 should work).
-Wait for increase to 21/21
-Wait for increase to 21/22
I tested this in pre21 and it definitely still happens.