Shiny Sims What to do??

Hi everyone I’ve been dealing with a very frustrating issue in The Sims 4 where some of my Sims suddenly get a shiny / plastic looking effect on their entire body/Face. What makes this especially confusing is that the effect seems to come and go randomly depending on zoom level, camera angle, lighting, or sometimes for no obvious reason at all.

What I’ve already tried:

Removed all broken / red CC that Tray Importer listed me

Removed all makeup, jewelry, and accessories one by one for testing 

No skin overlays are applied on the particular sim

Cleared cache multiple times (localthumbcache.package, etc.)

Adjusted graphics settings (post processing on/off)

Better Exceptions reports no errors

The worst part ist it is completely random sometimes it appears after an hour sometimes 2 minute after i reloaded the save,

Sometimes not always it appears and disappear when zooming in and out

So what should i do? i have over 7000 CC tried the 50/50 method but since this bug appears randomly it's very hard to figure it out also i have 20 families in my neighbourhood it might be that the shiney effect on them is triggered by something else then the sim before them this....