Player Heads don't follow your head when sneaking

Put the summary of the bug you're having here

What I expected to happen was...:
I put on a player head, and pressed shift, expecting the player head to stay in the same spot as my head.

What actually happened was...:
When I pressed shift, my player went into the sneaking position, but the player head I was wearing stayed in the position that my player was previously in.

Steps to Reproduce:
1. Go into third person mode
2. Put on a player skull,
3. Press your sneak hotkey