I'm using the old character models, and on one of my characters, a cloth user, some of the armor parts are invisible.
I am unable to see my current boots, pants and sleeves.
The boots, pants and sleeves have nothing in common, they were not found in the same zone or anything.

I can see pretty much all other armor parts, my other character wears reinforced and he has no invisible armor at all.

I saw another cloth user without sleeves today, aswell, I doubt he was running around without sleeves on.

Is there a way to fix this?

Currently having the same problem with plate helmets myself, but on the new characters.

Pretty funny to see those headless paladins and armsmen charging around.

you should do /callgm ingame and show the items to a GM.