I've been trying to go for flawless solo Prophecy this past week (I hope that triumph is fixed, or will be soon). So today I made it to the Hexahedron encounter, and upon entering, the position to put a rally banner was nonexistent and Toland was nowhere to be found. I killed myself to reset, and the game gave me error code:Guitar. Guitar usually occurs when there are too many items on the floor, so I was confused as to how this could happen in an empty room. I just assumed it was the result of the servers being a little strange following the March 23 update. I reset the dungeon, waited a few hours for things to stabilize, and tried again. On my second attempt, I made it halfway through the Hexahedron before one of the teleports sent me into a room with no Taken Hobgoblins. The Taken Acolytes and their turrets were spawning, but the Hobgoblins were not, which meant that no Taken Knights carrying motes could be spawned, and the encounter was unable to progress. I waited for about ten minutes before killing myself again, and this time I loaded back into the encounter like normal. This is extremely frustrating, especially as it makes flawless solo Prophecy pretty much unattainable. The triumph is already hard enough without having to worry about whether or not parts of an encounter will spawn correctly. I'm wondering whether this is a network error or the result of a game breaking bug in the new patch. Hopefully this helps resolve the issues.