Ue5 hair cant bond to mesh

i have a problem with hair bond, the same setting, hair bond well in 4.26, but failed in ue5.two of them are actually same project, there are no other variations. so what caused this issue, and how to fix it?is it a bug or something i missed in ue5?

update:I opened a copy with ue5.0,the hair still not bond to the mesh(this is an animation sequence, on default t pose the hair is fitting well, but I guess that’s because I designed this hair based on default pose)