Video of the issue here - [Link Removed]
Download the licensee repro here - [Link Removed]
Open in editor, select the various hair components.
Enable Simulation for each hair component. Rotate the head back and forth, the hair will move unnaturally (as if all collected into a single component).
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-116580 in the post.