How to stop particles from spawning too high

I have a particle emitter with it's parent moving through a scene. When the parent reaches the goal (Left side) I move it's transform back to it's original position.

Overtime, the particle emitter spawns it's particles higher and higher to no end. I can't understand why it's doing this.

I am using the particles for collision detection with the player and it is important that they do not rise on the Y axis. I have tried constraining the axis to no avail. They are spawning too high.

• Emitter is moving right to left

• Emitter teleports back to start pos (right) once reaching left side.

Image Key:

1. Working Correctly

2. Starting to rise higher

3. Far too high

Any help would be gladly appreciated! Thanks