Algabar

I also haven't played FO4 for some time. If I remember right, the black face glitch was introduced with the face textures of the official high res textures pack.
 
Here's a fix:
https://www.nexusmods.com/fallout4/mods/21907
 
Alternatively, you can simply use custom face textures. That's what I did. I never had the black face glitch, although I have the high res pack installed.