Hello! I also encountered this problem when rendering the groom cache using the Movie render queue. And I found the cause of the problem, but unfortunately I didn’t find a solution!
in the video
Red: there is no jitter in the abc cache of poly
Green: The hair asset is imported into UE, and there is no jitter in the animation of the Key in the sequence.
Only the yellow one is that the groom cache is shaking
y render settings were all sampling once, so I concluded that the groom cache was producing an error when the render was loading. But unfortunately I didn’t find a solution to the problem.