[Admins]

I don't see bugs there. The control-npc and the weapon npcs are not supposed to stay in the level where the action happens, so triggeraction is not even checking for them. They are only "warped" temporary to the location of the player to be able to easy check for near players and npcs.
The obj.trigger(action,params) or obj.scheduleevent(delay,action,params) functions should work fine in case you want to invoke an event.