Animator not sync with shader vertex animation?

I create a animator to play human model ,and use vertex animation texture to play cloth animation.but i found that the human model's animation will be not sync with cloth's animation after run for a while.

this is the vertex animation texture,bake each vertex 's position and normal on it.

every thing work fine in first ten seconds.

after run for a while,the body and cloth split .

the white people is fully same as another
white is create by vat shader and another is create by animator
after 10s they will be like this

and i m sure the frame rate compute is correct and both of them is 24