Sleeping fox model is not centered inside the hitbox

The bug

When a fox sleeps, it looks normal, but if you enable F3 + B, it's not because you'll see that model when sleeping is not centered in the hitbox.

To reproduce

1. Summon a fox, with NoAI and Sleeping set to 1b:

   /summon fox ~ ~ ~ {NoAI:1b,Sleeping:1b}

2. Enable F3+B
   → The sleeping fox model is not properly centered within the hitbox

Example