Outfits from Metahuman Creator come out unwelded.

Hello,

I’m trying to export an outfit for my Metahuman character and fix weight painting a little bit, but everytime I do, the skeletal mesh of the outfit comes out split in a way that corresponds to my UV islands layout. For example the sleeves of a jacket aren’t welded to the body part of a jacket in the exact same spot I have my UV seam in. I triple checked my input meshes before putting them into the resizable outfit system and they should be welded correctly.

There is a Weld option in the skeletal mesh settings but it removes all my material slots I need on the outfit. I start with 5 slots and it merges them into 1, which I don’t want.

Is there a way to weld the problematic parts without having to export the mesh to Blender and import it back again?

Thanks.