Quest Instance Mechanics

This has very likely been addressed previously, so apologies for the repeat, but I didn't see it within the past 5 or so pages of threads under Quests.

I was wondering, are there plans to fix the quest party restriction check when you enter an instanced area? As it currently stands, any instance checks for party member restrictions no matter where they are in the world. It would be very nice if it only checked party members in the immediate area, or, better still, prompted a "Some party members will not be allowed in this instance, proceed?" sort of message.

I say this because it becomes an issue for me at least once a day, and sometimes more than that. Apologies again if this is a repeat.