As in, unhitching for the process of taming.
Recently we had someone head close to our village, aggro all of our animals while we were offline and leave; causing them to dehitch and despawn over night whilst nobody was on. Even had they not done this, their tame progress would be reset if someone entered and rehitched.
I suggest a method to remove this edge case abuse, either by not having the animal unhitch/tame reset unless someone in the fight takes damage or some other method.