Hi, when working with Heterogeneous Volumes, they appear just fine, however when we start to animate them in a level sequence, they start to flicker.
If anyone know a fix / workaround that’d be massively appriciated 
I have exactly the same problem with the vdbs flickering when animating. Strangely they look ok in the viewport, but flicker / get brighter / darker when rendering a cinematic.
I have found that increasing the temporal anti-aliasing samples will help to reduce the flicker as the volume is sampled more than once per frame, and the random flicker is reduced because its averaged out.