Okay so I am really confused by this...

I was sleeping in my bed with Hancock as my character's romance partner and after we got up he walked over to my power armor and went to work on it. This is where his head vanished. He put on a welding mask and there was nothing there. I fast traveled to Salem Museum and then back to the Rocket Gas Station and his head is still gone...

What do I do?

I have a screenshot I took of it on my Xbox Live account but it won't let me post a link as proof.

Never mind. It fixed when I saved then loaded the save. Sorry for the panic, this was just a false alarm. XD