Particle effects won't collide/play properly

Posted this a couple of times on the forums a few weeks ago and never got an answer so I'm hoping I can get it here. For some context, I'm making a 2D platformer using the popular Rex Engine asset since I still can't seem to get my head wrapped around coding.

• I have a burst particle effect that plays when the player enters a body of water. When looking at it on its own, the effect is just fine. It's a simple burst effect that looks like water droplets that disappear eventually (looks like a splash). When testing it in-game though, the burst is very narrow and goes straight upwards really high. What's really odd though is that one particular body of water I have in another scene has the effect play perfectly. No issues there, so I don't know why everything else isn't working right.
  

• Another issue I'm having is that, at the bottom of all these bodies of water, I have a very simple particle effect playing where a small number of bubbles randomly spawn and go up for a bit in the water until they disappear. I want it set so that if they collide with the player, any terrain, or the water surface they get destroyed immediately, but for some reason, that doesn't seem to be working at all, even though I set the collisions with all the right layers.

• Similar to the one above, I have a burst particle that plays whenever an attack collides with an enemy. The particles actually collide with the ground this time, but they should bounce around the ground for a bit before disappearing. Instead, they get killed immediately.

I have no clue what's causing any of these and I've heard that Unity's particle system can get pretty finicky at times. Any help would be appreciated! Also, sorry for the formatting. I have no clue how answers works.