Bug or incorrect implementation of Heavy Armor and Dexterity modifiers and AC:
I have a Paladin with Chain Mail Armor and a Dexterity of 8. My AC is 15, which is not correct according to the rules, since Heavy Armor does not add (or subtract) any dexterity modifiers to AC, my AC should be 16, not 15. This appears to be a bug, or misapplication of the correct rules.
I installed the Hot fix this morning October 22, 2020, but I don't know if this value was wrong earlier.