Hi there,
the guide above was really helpful, thanks a lot! But I also had the issue that the hair did not follow the mesh anymore. After searching for a solution way too long I found a solution in another forum post.
Create new bindings for all groom assets as mentioned above and in the project settings set “Default Skin Cache Behavior” to “Inclusive”. This fixed it for me.
Unreal will prompt you to change the settings back every time you open the project but as long as it works and I don’t get any issues I will just ignore that…
Hope this will help some people to get this working properly.