Niagara Particle Meshes "bouncing" / glitching up and down after impact on surface. How can I make them stop?

I edited a particle effect of the https://Realistic Starter VFX Pack Vol 2

When the particles land on the floor (doesnt matter which floor or object) they do this weird glitchy bounce, which i dont want them too. Here a clip of the problem

And a Screenshot from the Emitter:

The unedited Niagara System has the same problem btw.

Couldn’t find anything on the topic, but not sure what I should’ve searched for.