Hyur Hairstyle 2 Lighting issue

[Sora_Oathkeeper]

I posted this in here before but I was told there was insufficient information on the problem. The problem is that there are parts of this hairstyle where the lighting is bugged. In these screenshots you can see that there is a big line going through the left hand side of the hair where there is no lighting. It is like this for everyone I've seen in game with this hair style. I also asked a few people if the hair style was like this for them and they said it was. Can this be fixed please?