I completed the Pit of Heresy dungeon today and the pinnacle drop (a helmet) reportedly went to the postmaster, but was not there when I went to check. (The postmaster was not full.)
The same thing happened to me. When we went through it again on the same character (we didn't do the machine gun quest properly the first time 🤦🏾♀️) my drop was still on the ground.
Hi there, Thanks for your report. Try clearing your console cache and seeing if it appears, you can find steps to do so through the link below. https://www.bungie.net/en/Help/Article/45179