This bug freezes every mob in my world. First it started with my only tamed mob, my horse which riding nor falling could fix it it was even just floating there. Then i noticed that the rest of my mobs were becoming frozen too my iron golem cows chickens and the rest of the more recent horses. I can only fix this when I get exit and re enter the world which gets quite annoying. Please look into this to see if there is a more relevant fix than leaving the world.