I built my house next to the giant portal in the abeyance realm. For some reason, the green deer spawn inside my house, but ONLY when I have all the doors closed? I'm not sure if there's some backend math that's measuring the number of deer in the...
I'm having the same issue, almost as soon as I close the door, I have animals spawning inside the house.
So far they have only been the regular(brown) deer, but I'm just waiting for some hostile creatures to spawn.