Hey, I have no idea if you managed to fix this bug or not, but I had the same exact issue with fine clothes bugging in first person. I found a mod that seemed to fix the issue for me, so hopefully it will work for you if you are still having this problem. (Only edits first person for female models. If you're having this bug occur with male player models, then I don't know how to help you.) https://www.nexusmods.com/skyrim/mods/75062/?tab=files