Alright so everyone who's done this know about the mechanics with the 3rd fight. What happens is you have to finish the puzzle in a specific order (north -> south -> south -> north).

What happens when you don't do it in order, is the buttons become unresponsive. That's not the problem, because as far as I can see, that's by design. The bug is when you wipe and it's supposed to reset, it doesn't.

Would be great if this gets fixed, because having to reset it and clear trash is pretty dumb. It's the most time consuming part of the entire raid.