Please always give full information on mods you use with the game (in this case I see the XC_Bags mod on your screenshot), so devs and modders can better evaluate where the problem might come from.
Edit: To complete this with your reddit-post (would make more sense to post that here or tell the mod creators, so they can have a look on it):
https://www.reddit.com/r/DivinityOr...s_but_obnoxious_helmet_bug_with_picture/Used mods:
'Sneaking mode without cover' (Nexus), 'QuietDayOnTheMarket' (Nexus), 'XC_Bags' (Steam/Nexus).
The Sneaking-Mod is the only mod that's related to models (Assets\Effects\Effects_Models).
My scripts don't touch those things or anything related.