Ok take a deep breath. Good news is that it all works at some point.
I would take your guys and triggers, logics, waypoints, and whatever else that is related to the sidechat you have, group them together and copy (
control "C" for in game copying) and transfer these to Desert island useing in ( pasted by
control "V". ) Save it as Sidechat test or what-ever you want. Also go into mission folder and save everything in there execpt for (mission sqm) to the new folder Sidechat Test. This way there is no interference, no enemy.
Now test and see.
It maybe timing error, two triggers going off at once, logic waypoints maybe waiting on another condition.
This is sounds compliacated, but is easy to do and good for bebugging.