Hello. I have the same problem as you. I think the thickness of the hair is being ignored when rendering.
Here’s what I tried
-Set the thickness of HairTips etc. on the BP Groom component
-Execute the commands in [RESOLVED] Metahuman Hair renders on top of translucent materials - #5 by Ant_tekk with Execute Command
“r.HairStrands.ComposeAfterTranslucency - 0”
-Turn off Lumen
…It seems to have improved a little, but I’ll let you know that it has almost no effect.