[Expirimental] The Flying cats are back

So, me and my friend were walking through a forest when guess what, her cats started hovering above the ground. They were fully grown and moving around, hovering a block off the ground. They were also clipping directly through blocks and just hovering 1 block off the ground, yet they were walking and moving. When she stopped, all the cats started floating around her, like a ritual.  I’m not sure how this happened, as I’m pretty sure that this is an animation glitch, but I do have some loosely thrown-together steps on it. (I’ll provide a seed as soon as possible, as I can’t right now)

1. Host a multiplayer world
2. Wait for someone else to join
3. Spawn some cats
4. Have the person who entered the world tame those cats
5. log out of the world 
6. Log back into the world

Expected Results: Cats staying on the ground

Observed results: Cats hovering and clipping through blocks, such as leaves, wood, and others.