I have a question about meta-human retarget. Please help me

Hello, I’m going to retarget meta-humans from Maya, put on animation, simulate clothes, and bring them for Almbig. Retarget was successful, but the same retarget mannequin and meta-human are different. If the same animation is applied, it is well attached before the animation starts, but the animation proceeds and there is a slight difference. I want to know why. Please help me.

// // Oh! For your information, the legs are well attached. There seems to be a difference between the arm and the body of the head.