So, the glitch fixed when getting off horses(you would have to rejoin the game to see them and ride again) seems to be happening with getting off of a boat when you have an entity in it. I am only posting this here because maybe I'm helping out? Anyways, it only just happened recently with my horse in tow. Tried the fix for the horse glitch and there they were, so that's why I said the glitches are very similar.

(Tried to capture some video, but I think it got corrupted somehow...)