After having worked out a viable strat the encounter is very doable and fun. But we experienced "buggy" behaviour with two big oozes not merging properly, too.
Q u o t e: Can you please fix the issue with the instance portal? It's not visible for like half our raid.
I understand that phasing is the problem, but you somehow fixed it for 5man, can't you do the same for the 25man so we can also see the portal?
From a phasing perspective the raid portals are exactly like the dungeon portals, it's a completely seperate bug that causes players to not see the portals. We're fixing it in a later PTR push.