animation called particles can cause other particles to spawn

when multiple particles are added to one entity, calling a particle can cause other particles to also be called
expected: calling a particle spawns only that particle
observed: calling a particle can spawn other particles

*tested on player.entity.json with 4 custom particles called by animation controllers

in this image the firefly particles are not being called (or at least not at this rate), only a leaf spawner particle is being called. If I turn off the leaf spawner, the fireflies return to a normal rate.