Animation Retarget Combined Mesh Overlap 5.6

Hello, when i’m retargeting an animation from a Metahuman body to a Combined Mesh of the same Metahuman , there is a slightly off overlap. (see screen)

In neutral pose the Combined Mesh and the Metahuman are the same, but when retargeting, they are a little bit off. Is there a solution to that or is it a bug ? Ty