Hi ,
I created demo project which demonstrate this Bug in Collision Module In Anamorphic Lens Flare Particle System- I use “_FX_LogoReveal_ICE” Particle System from Elemental Demo with following modifications:
1.Use only OrangeFlare Emitter. Delete all others;
2.”Emitter Loops”=0;
3.Add Collision Module;
In “M_LensFlare_Magic_01” Material –> Blend Mode of main material node can be Additive or Translucent
When started project open map Untitled.umap and play
Hope this info will be enough for easy reproducing of concerned bug