How do I stop Niagara particles colliding with each other

[Callideus]

My Niagara particles need to collide with characters and the environment to return collision events for damage, but when I turn collision on, it causes the particles to spawn in at weird positions. In the Niagara system editor, it looks like the particles spawn from three different places while in game there’s just a small puff of particles at the origin, then they stop.


Collision turned off

Collision turned on

The lack of resources on how to fix this suggests it’s something so obvious it doesn’t need to be asked. How do I stop the particles from colliding with each other while still colliding with geometry?

[Callideus]

Edit: I’ve discovered it has something to do with the velocity of the particles. The initial x velocity is a random number between 1500 and 2000 and when gravity is applied in the x or y directions the multiple streams reduce.
Haven’t fixed it yet, but it’s a discovery.