I was soloing the Nightfall on Master, did 1 run, went fine, got platinum, an ascendant shard, and 2 exotics, and a bump from 80% to 90% completion on the "Brightfall" Solstice Challenge. The second run, after the mine room, the mission got stuck at "Claim Your Treasure", even after I opened the fake chest and went down the tube, for 20 seconds, nothing spawned. There were supposed to be 4 champions (1 vex barrier, 1 vex overload, 1 cabal barrier, and 1 cabal unstoppable), but there was nothing. All of a sudden, the boss spawned, and the room went as normal, and afterwards, the chest just spawned, it didn't prompt "Champion Rewards: bronze/silver/gold/platinum", I didn't get any enhancement prisms or ascendant shards or even cores, the mission just completed, my score and multiplier still showing that it was a nightfall, and master modifiers were still showing. Not only did I not get rewards, the "Brighfall" challenge is still at 90%, what it was before I started the run, its as if the mission just got completely nullified when it didn't progress past "Claim Your Treasure", like it was not only not a nightfall, but also not even a strike (the challenge gives bonus progress for nightfalls, but still some progress for normal strikes). Unfortunately I didn't record, but I really don't care about the rewards or anything, I'll just do another run, but seems like an annoying bug, especially if this were to happen to someone on a GM run. So, heres a post on a random chaotic forum about a bug that everyone can ignore or not ignore, instead of an official report filled out directly to the game developers Q&A team so they can look into it, like every other game has.