Cats can't stand on chest/prevent opening chest.

Tamed Cats when randomly path finding, if they stand on top of a chest they switch to the sitting model without me clicking on them. I cannot click them for them to switch back to standing, and if I push them off then they do resume back to the standing model.

What I expected to happen was...:
The cat should stand on chests as normal blocks and in my opinion they should not stop me from opening the chest.

What actually happened was...:
When the cat is on a chest they go to the sitting model and I cannot open the chest when they are on top of it.

Steps to Reproduce:
1.tame a cat
2.place several  chests around them so it is more likely for them to jump on them
3. either wait for the cat to randomly jump on a chest or nudge them up a stair case and onto a chest.