Yeah, I have tested it without cloth physics that was one of the first things I thought to try…the first thing I assumed was when I seen it was that the skin weight transferred poorly. So I turned off cloth physics to see and it doesn’t do it at all…only with physics.
Unless your just talking about removing the clothes in general. the only part of the body I brought I exported was the part of the belly that’s visible in the front and the neck/head and her wrists/hands I didn’t export her with the rest of the mesh…it’s not transparent…I did that for better performance.
As a note…Remember I remade the entire character and redid the skin weights and all this 5 times and it did the same exact thing every single time.