In the latest hotfix, the Seething Cache has been removed from the Zaralek Caverns Meta achievement and thus, also the Dragonflight Meta achievement!
Many players are trying to get the A World Awoken for the Good Boy's Leash mount. One of the problems that players are having is trying to finish Que Zara(lek), Zara(lek) due to one of the requirements of Treasures of Zaralek Cavern: the Seething Cache.
This is a scavenger hunt, similar to the hunt for Reins of the Long-Forgotten Hippogryph, where the first person to loot the Chest after finding 3 orbs despawns it for everyone else and must wait for the next spawn. As such, this is a frustrating achievement to be included in the Meta but good news, it has been removed!
Hopefully this makes it easier for those who are working their way towards the Dragonflight Meta and obtaining Taivan!