[Dungeon Challange][Temple of the Jade Serpent] Lorewalker Stonestep

[Koler]

WoW Freakz link: https://www.wow-freakz.com/zone.php?zone=5956&&name=temple-of-the-jade-serpent and https://www.wow-freakz.com/npc_finder.php?npc=56843&&name=lorewalker-stonestep
Bug description: Cannot gain credit for Lorewalker Stonestep in dungeon challenge. I saw this report, https://forum.wow-freakz.com/Temple-of-the-Jade-Serpent-Restoring-Jade-s-Purity-t388481.html and I tried to talk to the Lorewalker for 5 times, but it doesn't give you credit. We also did Liu and got to Sha, but sha bugs too http://i.imgur.com/ohzH3bK.jpg getting infinite immunity (counter resets from 29 to 30 every second)
Proof: http://i.imgur.com/ohzH3bK.jpg

[Hocestbellum]

I am bringing this topic to life because I tried to complete the dungeon twice and still no credit for assisting Lorewalker Stonestep is given. This dungeon is bugged and still needs to be fixed. You have to move on from Lorewalker Stonestep to defeat the Sha of Doubt. This is part of a questline in the Timeless Isle and I cannot finish it.