[Admins]

Hmmm the player join stuff has just been added some weeks ago, I guess it should also set the "current player" if you call a script function for the player itself. The "current player" is used for old scripting functions with side effects - triggeraction is a function of npcs, since it is sending the trigger to near players in the current level of the npc, but if the action is "clientside" then it is only sent to the "current player". Adding a triggerclient function for players would make sense here I guess.