My horse spawned out of existence last time I opened the world, and the game seemed like it was freezing, I noticed it in the smoker, and I logged back in this morning and saw my invisible horse spawn back in the distance before it crashed my game. Keeps crashing my game ever since.
Same thing happened to me, I start the world and it instantly crashed due to the ticking entity, not sure which one. I have 2 horses but I don't believe any WT were around me last time I logged in.
I am also having this problem with barrels. Regular chests seem to be fine.