I just completed a strike mission and after returning to the tower the postmaster had an item for me, under the heading "Lost Items", a decoherent engram.
Did this engram drop during the strike and I just didn't notice it, is that why it is at the postmaster, or is it an extra reward for doing the strike? If it is because it dropped during the strike and I didn't pick it up, will all such engrams end up at the postmaster?