help, can't remove MetaHuman body seam cut by uv seams

[akfheaven]

UE5.6 create metahuman with ugly body seams, I confirm it’s auto cut according to UV island seams.

I try to fix it by using weld in the editing tool, the preview shows weld correctly, but after I click “accept”, all restore unchanged.

I also try to weld in blend and reimport, but after reimport as skeletal mesh, the mesh still be cut by the importer. btw if I reimport it as static mesh the seams is fixed.
so I still can’t fix it as skeletal mesh.

[akfheaven]

after lots of test, I found that it’s the bentnormal problem.
I try to make the body bentmormal to (0, 0, 1) and the seams dispeared.
but I still don’t know if this is the right way to fix it.