I had this too and it really took me out of playing the game as I was in the middle of expanding and remodeling the village on an island. I know I set the game to a LAN one to access cheats, and had to log off after to get the game back to just on this computer, but I'm not sure if that is related or not. Oddly enough the naturally generated, and the iron golem I built were still wandering around when I went to spectator to see if they got stuck in a cave again or something.
I had this too and it really took me out of playing the game as I was in the middle of expanding and remodeling the village on an island. I know I set the game to a LAN one to access cheats, and had to log off after to get the game back to just on this computer, but I'm not sure if that is related or not. Oddly enough the naturally generated, and the iron golem I built were still wandering around when I went to spectator to see if they got stuck in a cave again or something.