Important profession-related mobs in Pandaria are bugged

[Anaximander]

WoW Freakz link: https://www.wow-freakz.com/npc_finder.php?npc=59378&name=paleblade-flesheater
Bug description: many of this mobs are unactive/unkillable. This mobs have highest drop chance of https://www.wow-freakz.com/item_finder.php?item=89112&name=mote-of-harmony, used in many professions, uncluding archeology. So, while archeology mostly doesnt works properly, farming https://www.wow-freakz.com/item_finder.php?item=89112&name=mote-of-harmony is the most acceptable way to obtain https://www.wow-freakz.com/item_finder.php?item=87399&name=restored-artifact
Proof: 1-screenshot i use Arcane explosion and nothing happened with mobs
https://imgur.com/S0spYRe
2-nd one i bring normal mob in that place and cruell kill
https://imgur.com/27Lf82J

Also, it's easy test in game.