I don't knwo if it's a bug or not, maybe i did something wrong.
I'm preparing a campaign and when i was doing the very first encounters i noticed when i possesed an enemy NPC it gained some XP. Later after finishing some scenarios and otherm encounters the auto XP gained got to a lvl up.
It happens when i possess someone or the combat starts.
¿Why is it happening? I hope is not a bug, because it messes with balance and it'll become unplayable at some point.