Problems to complete Archievement 2556

[kampz]

Wowhead quest link:
http://pt.wowhead.com/achievement=2556/controle-de-pragas#english-comments

WoW Freakz quest link:
https://www.wow-freakz.com/achievements.php?achievement=2556&name=pest-control
https://www.wow-freakz.com/npc_finder.php?npc=32261&name=crystal-spider

Bug description: Hi, I still playing in server Genesis, and have the problem to complet the Archievement "Pest Control", the last mob Crystal Spider don´t be available to kill! Just find her like battle pet, but not the status neutral. Search for all locales where Crystal Spider can appear and the same result, in dungeons llike OCULLUS, NEXUS, not possible play battle pet or kill her. I suggest change, the mob pets into the dungeons, your status to neutral.

thanks and I hope the genesis server come back to populous server again.

Proof: https://imgur.com/a/LI3mf