[Cata] Elementium Gem Clusters dissapeared along with Madness Cache

Currently sitting at 55/60 Gem Clusters before the 25m Madness encounter. After defeating Deathwing, all the epic loot was removed from the Cache leaving the Elementium Gem Clusters. Before the Master Looter could loot them to me, the cache dissapeared along with the Clusters. I was the only Rogue in the group and all the other clusters up to that point was looted to me. This is so frustrating, now I have to wait another week to be able to complete the quest. Not to mention have to go through that buggy raid again.

Belitheria - US Faerlina