Pixelated Eyebrow Texture?

My current legacy sim, Elia, is finally a teenager. First day of high school she's sitting next to this guy, and I was like yep that's a face that's gonna grace my family tree!

However I noticed his eyebrows were... weird. So I went into CAS to freshen him up with some CC hair and whatnot, and fix the eyebrows, but no matter which ones I choose theres this weird pixelation around them. Doesn't matter if its Maxis or CC, I've also tried detail edit mode to see if it was a stretching issue but nothing has worked.

I'll give him a big fringe if I have to, but does anyone have any ideas as to why this is happening?

*Edit to add: It's not due to makeup, hats, head or body accessories etc.

https://preview.redd.it/fxu8y565i4wc1.png?width=782&format=png&auto=webp&s=7a0403a9e9d79046278bc579a27584b9b97d4980