I've done this twice on Colden Green and managed to talk the apprentice into surrendering. Muskroot then says he's giving us a bonus. This should give you some sort of flavourful end loot I assume, but instead we're getting low grade monster drops. It seems to be the same bug that affected Brewery and Grandmother Simza for a while.
We recieved a Jolting gem on one run, 30 plain arrows on another.