I have tried twice now and The Curator just bugs out on a phase transition… He just doesn’t come back after like 30%~ EDIT: Sorry you should start around 60-70%~ I did have this first but I only seen it once, most my attempts were at 30~
I can’t leave or anything, I have to Alt F4 and restart the whole thing. I’m still classified as I’m in combat XD
Anyone else experiencing this issue?
Yep 
exact same situation
also had this bug, ran it twice and boss went invis at 30% first run and 60% the second and would never come back.
I’m also having the same problem, 3 separate attempts where I have to clear the entire dungeon again only to have him bug out. If there is adds up and he’s missing let the adds kill you so you can just respawn and not lose any progress.
yep, same here–tried to run twice and both times during a phase out around 60% he never came back
Im having this exact issue as well. Ive ran it 3 seperate times full clears and cant progress because the boss just disappears around 60%. I can hear him swinging away under the floor somewhere to no avail. Relog and restart didn’t fix the issue. Someone please help blizz… i want my world tier 3 
+1 - our group ran into the same issue
I have tried 3 times and he always despawns. now the game disconnected and says my account is locked.