This has happened to me twice now. I go and get the exotic cipher quest from Xur and grind for almost two to three hours to get through it. But, when I turn in the quest after its finished I receive nothing because my inventory is full. I was just expecting it to go straight to my postmaster and it wasnt there. So, am I just screwed and gotta wait until next weekend? Do I just have to make sure that I have an empty inventory to pick it up?