APEX clothing import adjusts normal direction of mesh

I’m able to import my mesh into UE4, and after resolving multiple other issues, I’ve come across something that is boggling my mind. When I created the mesh, I mirrored and flipped the UVs in order to have a (roughly) seemless texture across the mesh. When I import it into UE4 and apply the texture, everything looks fine, but when I apply the APEX clothing file, it flips the normal direction for part of the mesh. I’m not sure why this would be and I’ve tried everything I can think of, but nothing seems to fix the issue.

The attached pictures show the mesh with the clothing turned off and with the clothing turned off.