Yo!
So I placed a ribbon emitter in my particle system and when I have the ribbon emitter deactivated it works normal but when its activated the particle system wont retrigger.
This issue is in the cascade, play mode (trigger key wont trigger again) and in sequence editor.
Thanks in advance!
I had the same issue before and from what I understood if you deactivate the ribbon, the garbage collector gets rid of It entirely and you’re not able to reactivate It.
Depending on what you need to achieve, one solution could be to kill the particle system and spawn it again when you need it. I tried some alternatives, like using a parameter for the spawn/spawn rate and setting it to 0 but it didn’t work.
Let me know if you find something better 
Omg… Gonna try it but otherwise im gonna do it mesh based.