I don't know for sure if this is a bug but I did notice it.
I have the classic vampire hair with the goatee and slicked back hair and I notice this when I was looking at the biomorph suit with out a vanity helm.
Here are picture with out a vanity helmet.
Here is a picture with the armored helmet.
I don't know if that's a bug but I thought it was, so I shared it with you guys