The Goblin spirits from the new DLC start rapidly losing entertainment as soon as you put them in a Polterguest room even if it is the correct decor theme and all buzz bonuses are active. I had multiple entertainment items in the room (pond, rock bed, music device, bookcase) but the spirits would not use any of them so their entertainment level was stuck at 0%. This happened for any Goblin spirit I put in the room. This did not happen for Yeti spirits and I have not had this issue in the past before the new pack. I had to remove all Goblins from my museum so they're currently unplayable for me due to this issue.