ill give you an exemple, i made the map when the tavern had 5 hero, the other 3 (alchemist, firelord and tinker) came whit another patch, so on my map the tavern is default but only 5 hero even if i reset it to default. but if it was a melee map the tavern whould have been update to 8 hero.
i know theres a way to reset a map back to melee, i just dont know how.