For some reason when I switch from Rest Mode to Pose Mose the mesh of the head "squishes" without the bones moving.
Does anyone know why this is happening? I've tried ALT+R,S,G and Clear All Transforms and got no change.
The file can be located here: https://drive.google.com/file/d/1o12SfNnrZHMg9C7y0xWyL0AtiMrA0x1C/view?usp=sharing
Thank you!