Hi,
to repro:
- Place planar reflection to your scene (you will need to enabled it in project settings)
- Create niagara particle system, add any emitter that constatnly spawns particles, make particles to be mesh particles
- Create actor blueprint, add add to it aforementioned particle system and any static mesh
- Place actor over planar reflections.
- Hit play, notice that actor mesh gets relfelcted while particle system meshes are not.
yo