Particles Failing to Spawn - Intermittent

We have a grenade implementation where a particle effect, sound, and damage are played when the lifespan of the actor ends. Sometimes, the particle effect does not play. This seems to only happen when the grenade is obstructed from view, and only intermittently. This happens even when the bounding box on the particle emitter is set to fixed and encompasses the entire level. Anyone have an idea on how to fix this? Blueprint below.