I was doing Prophecy Dungeon on day one and two of Season of the Chosen. On the Cube Encounter, sometimes after depositing motes on the pillar, you won't be able to progress. I have experienced two variants. One variant was after I deposit the motes on the required pillar, I am not able to progress. The middle doesn't light up the same way it normally does, but Hobgoblins and Knights stop spawning, the pillars stop glowing, but if I go to the middle it does nothing. The second variant I experienced was when going to the middle to change sides, I start going up to the middle, and then it drops me back to the side I was just on. Going back to the middle doesn't progress me, and there are no more pillars, Hobgoblins, or Knights. This is also possible with more than one person, as I was recently doing it with a friend who was teleported to the next room, while I was dropped down. Only way to progress this way is to have the person in the correct room revive you. The first two happened seemingly at random, though I experienced the side changing glitch twice in a row when reloading Xenophage before jumping into the middle. The time I experienced the glitch with a friend, I was not using Xenophage.