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.

8250951--1079733--upload_2022-7-4_0-21-38.png
this is the vertex animation texture,bake each vertex 's position and normal on it.

8250951--1079736--upload_2022-7-4_0-23-8.png
every thing work fine in first ten seconds.

8250951--1079739--upload_2022-7-4_0-23-54.png
after run for a while,the body and cloth split .

8250978--1079742--upload_2022-7-4_0-44-36.png
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
8250978--1079745--upload_2022-7-4_0-46-7.png

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