What worked for me for cinematic use case:
- Forcing LODs in lod sync (obviously)
- Setting the bounds in all hair assets in the character BP to high number (I set 99 probably overkill)
- In Groom Assets, ensuring all LODs are set to visible and have Geometry Type: Strands selected (as per @molotow121).
Step 2 eliminated LOD popping when zooming out. Step three eliminated flickering/glitches. For now. I’d like to test if forcing LOD and increasing bounds solves it without step 3, I think I did this before.