Just happened on level 37, 2nd fractal (not the berserker/firestorm one). When we reached the boss room (the one with the dredge boss and the sonic weapons), nothing happened. Braham and Rox just stood near the entrance but no conversation started. We tried resetting the fractal (party suicide), but it didn’t help. We had to abandon the entire run.
This is a rare but known bug where if everybody runs inside the boss room ahead of Rox and Braham, the fractal sometimes gets bugged and does not progress. To avoid this, always have one person stay outside the room and follow Rox and Braham inside once they arrive.
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