[Mechanar] Lost Treasure

[Xanderhunter]

WoW Freakz link: https://www.wow-freakz.com/quest_helper.php?quest=29659&name=lost-treasure
Bug description: For the quest Lost Treasure in The Mechanar if you try to use the Jagged Red Crystal (https://www.wowhead.com/item=30437/jagged-red-crystal) or the Jagged Blue Crystal (https://www.wowhead.com/item=30436/jagged-blue-crystal) it deletes them and says Item Not Found instead of giving Cache of the Legion Key (https://www.wowhead.com/item=30438/cache-of-the-legion-key). The wowhead link for Cache of the Legion Key says that the it was removed and the Cache of the Legion (https://www.wowhead.com/object=184465/cache-of-the-legion) should unlock after killing both Gatewatcher Gyro-Kill (https://www.wowhead.com/npc=19218/gatewatcher-gyro-kill) and Gatewatcher Iron Hand (https://www.wowhead.com/npc=19710/gatewatcher-iron-hand)
Proof:

[Dutchbag]

Confirmed.