It's probably just another bug, which Bethesda is known for.
And, as the Unofficial Skyrim Creation Content Patch doesn't mention anything about a hood in their changelog, I think it's a bug on your end, caused by a sequence of actions/scripts of your specific playthrough.
If you're playing on PC, you can try deleting the item and giving yourself a new instance using the console:
player.removeitem xx089eef 1
player.additem xx089eef 1
Hopefully this will reset whatever messes up the linked mesh and/or texture.
In case people wonder where this item can be found: the Vampire Leather Hood is from the Bloodchill Manor Creation, and part of the Anniversary Edition of Skyrim (but it was also sold separately in the Creation Club in-game shop of the Special Edition).