Hello Devs,
I believe there is a bug for Shadow Fissure on Kel’Thuzad. During our kill last night, a few times Shadow Fissure would show up on the ground, the light would go straight up (kill mechanic) and then the ground effect would disappear and then reappear for 1-2 seconds again. Then it would disappear doing no damage.
It looked like some sort of visual glitch. It wasn’t harmful, but it definitely led some of us to believe a second Shadow Fissure was going to immediately come right after the first one ended.
I hope this feedback helps! The raid was great and we had really great loot drops!
Cheers!