The desert rabbits run in place, stuck, next to the block they're facing and won't move until a player goes nearby them. I will attach a video of this happening as I am in spectator mode showing the desert bunnies running into the sand blocks and then moving as soon as I appear into survival mode. This happens to all of them. They will act normal and then as they're running, they get stuck running!
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Can confirm, though I think this is a duplicate of MC-150224.
Duplicate of MC-150224. Also if you find issue in a modded version, please check if it happens in vanilla before reporting it.