Hey there, I just finished Valithria on 25 HC and got stuck inside the boss room. So I tried relog, then HS and enter ICC again. Boss room still closed so I can’t proceed to next boss.
Same bug happened to me on 10 Heroic. Healed her using “Concentrated Flame”, because I was playing DH alt, looted the chest, but none of the gates opened. And they stayed closed even after I re-entered raid. I have several characters who were doing this raid on this week and this is the only one who had this bug.