Recently completed The Lightblade nightfall on Grandmaster difficulty for the first time and when the boss was defeated nothing but one item (the adept version of the comedian) was rewarded. What gives, the other Grandmasters I've completed dropped a surplus of loot including Ascendant shards and at least one exotic armor piece in addition to the adept version of whatever gun is available for that week. Even went to the postmaster and double checked on DIM to see if it was sent there but nothing was, and there was plenty of space in both my personal inventory and postmaster inventory.