Trigger Volume Activates Elsewhere

I’m not sure what you mean when you say “the reverb doesn’t trigger”. Just to be sure, can you let me know what the result is if you add a “Cast To Character” node as shown in my screenshot, replacing the Print String in the screenshot with your Play/Stop calls? You would need a new cast node for each event so that it can continue on to the appropriate Play/Stop node. You may want to wire a print string into the “Cast Failed” execution pin to confirm if the cast was successful or not.