Hunters: Tamable Fenryr not spawning in cave behind boss after you solo M0 Fenryr

[SELFISHTIGER1]

WoW Freakz link: https://www.wow-freakz.com/npc_finder.php?npc=119990&&name=fenryr
Bug description: Tamable version of Fenryr doesn't spawn for hunters. If a hunter solos mythic 0 Halls of Valor and defeats Hymdall and Fenryr, a tamable version of Fenryr skin spawns in the cave behind the Fenryr boss's position when his health is 65%
Proof: Just solo mythic 0 Halls of Valor, kill hymdall. Then Fenryr. Attack him, he runs to other side of area, go there and kill him. The tamable fenryr should spawn in the cave behind the fenryr boss, but as i said it doesnt spawn right now.
FYI, you need at least 800k solo dps in order to actually kill fenryr boss solo, because he heals back up to 66% health if you dont kill him in time. I just made an attempt however there was no tamable pet. I even attempted to go out and come back in and relog, but the tamable version of the pet was simply not there.

Here is a retail video showing the above process.
https://youtube.com/watch?v=aJsy8BJ2ock: