Helmet outline of mobs or 3rd person players is glowing even when not wearing a helmet

when i shot myself with a glowing arrow and went into third person i noticed that my head outline was a lot larger than it should have been. the closer you look you the more space ion between you head and the outline there is. i later found out that the this only happens when the hat layer is enabled i think this may be a bug because this dosn't work with any other layers besides the hat layer and i do not use that layer in my skin.

~~~_{HOW TO REPLICATE}~~~
1. turn on the hat layer in 'skin customization' settings
2. shoot yourself with a spectral arrow or give it to yourself with /effect
3. go into 3rd person.
4. look down and it should become very obvious