I finished questline to become an archmage, and ended up with items:
- Morokei (black face mask)
- Archmage's Robes (includes a overhead hood)

Sometimes when wearing both of them it doesn't render the Morokei mask. It makes my character seem like "invisible man", just the hood showing in the head with empty insides. Usually when i restart game its fixed, but its just completely random. I'd say 70% of the time mask is not showing.