To start the beautiful bug of the second boss (obsidian pillar) that almost everyone takes a CTD (Crash To Desktop) and ends with the Dungeon.
And second, a bug of the third boss (Lord Draveneaux) that he comes to attack you out of the area and out of nowhere the entrance is blocked later, even though it is with the appearance of being allowed. Since this happened all the time, we decided to kill him outside, so there's the result:
Time: 12:27 Ally DPS: 102k Meafla :19.6k

Time: 12:27 Enemy DPS: 23.9k Lord Draveneaux :23.1k Caustic Shard :814

In game image third boss: