Recently I've been testing the new features and I saw that crouch moves the skin feet's 2nd layer to right above it.

(PS: Feet layer is part of the legs' second layer, so any part of the layer of legs might move too, not sure though.) (PS #2: My skin has a second feet layer (a.k.a. Legs)

How to Reproduce:
1. Go on 3rd person.
2. Crouch.
3. Look at the skin feet

Images below.

Look at the skin feet...

Now look at the crouching feet...