Logged in 30 min after reset for advent calendar on shad, did not "lose" mystery gift box (red xmas present in ETC) in the chat upon attempt to turn in quest. Quest is gone now and marked as complete? Still have the mystery gift box in inventory so I tried to drop to re-gain quest, but no new quest. Oh well, attempted to do the advent quest on bishop after getting nothing, above. Did not lose anything upon attempt to turn in quest. So I took a screenshot on my bishop, present still in inventory and had space in all tabs.