I was playing on my Minecraft world with my cousin, and she put a lead on her cat and tied it up to a fence and put it in the sit animation, but when she did so, her cat started moving around in the sit animation. When the lead was taken off, the cat still scooted around. We tried to feed the cat fish, breed it with another, tie it back up on a lead, and sit and unsit the cat to try and solve the problem. A few moments later, the cat completely disappeared, and was missing for a long time, but we finally found it at the edge of our biome near the ocean, in the walk animation. We brought it back, and it was normal again, but when we put a lead on it, it glitched again. The following day, I was attempting to put two of my Minecraft cats in a pin in my house, and when I put a lead on one of them and tied it to a fence and put it in the sit animation, it did the same thing-it was moving and scooting around in the sit animation. My cat has not disappeared yet, but it has not stopped walking around in the sit animation.