I'd make it stop glitching. I don't mean loot drops, but for it to let you start a mission like it's supposed to do.
this problem only seems to happen when ur pugging on a map.
Its usually because someone in the party has an instance of someone else, and its been completed.
Sadly the only fix to this problem is to have 2 people in party, and then recruit the other 2 in a new instance after u logged off and back on to reply the mission.