Bullet VFX shell casing loop effect not working correctly with Matinee movie export

Hi there. So I have a matinee cinematic using the Bullet Casing loop effect from Bullet VFX Pack (found here: https://www.unrealengine.com/content/8f3ff41ae2584245a2463028f920c2e0) and toggling them on and off in Matinee.

Anyway. It looks great when I play the level, but since this project is pre-rendered, I am doing jpg image sequence exports from Matinee. The problem is that it does not look the same. I can see the casings spawn on the first frame but then they disappear. Please advise.