So I've stumbled into this technical pizdec while working on Invasion Chapter 6 and it's actually really annoying and confusing.
In short:
-I attempted to make a trigger system that displays a quote when an actor fires their gun.
-Instead of playing the quote, nothing happens.
-Curiously, the quote plays normally if the player fires the weapon.
I assumed the bug was caused by unfinished triggers in the map - so I copied the system and the actor into a new map.
The same thing occurred. I tried replicating the system with vars, but to no avail. It would still not even say the quote.
Demonstration of technical pizdec here