How do I have each instance of an enemy emit a sound based on a random timer?

I'm modifying the ghost shooter template and I would like each creature to make a sound every random couple of seconds. Right now I have:

System: For each monster

System: Every Random(4)

Audio: Play Choose(my list of sounds) at object Monster

I think what's happening is the sound is only playing at the most recently spawned monster each time. The goal is to have it more like DOOM where each monster periodically makes its own sound based on its own random timer.

Thanks! If there are different suggestions for something that has similar results, but a different methodology, that would be great too.

here's the project as well. my code is at the bottom of the event sheet. drive.google.com/file/d/1kty5EjfwkH4k8641RTswDdVuy9C6vEsm/view

Use Pick a random Monster instance instead of For each Monster