[Fixed] Cat runs around while being sat, sliding in the sitting position

I don't know how to reproduce this bug, it just happened and I couldn't get any other cat to behave the same way.

Here are some observations:
-Interacting with the cat in any way won't change its bugged state;
-It keeps running and never stops.

I've attached a video showing the bug and the bugged world so you can confirm this.
Vanilla creative world. Nothing special.