Blight Boar concert doesn't work. [Darkmoon Faire]

[Valindra]

Bug description: On retail, in patch 7.2.5, there was a mini-game called Blight Boar, at the Darkmoon Faire. The concert event started every hour on the half hour. The concert takes place in an area with lots of Undead NPCs called the Cauldron of Rock. Periodically, a rare elite would spawn which you must defeat. This is a boss, the Death Metal Knight. He drops quite a few rewards. Well, none of this works here.

Rewards here:
https://www.wow-freakz.com/item_finder.php?item=151255&&name=necromedes-the-death-resonator
https://www.wow-freakz.com/item_finder.php?item=151254&&name=chain-linked-cage-helm
https://www.wow-freakz.com/item_finder.php?item=151252&&name=leather-lined-cage-helm
https://www.wow-freakz.com/item_finder.php?item=151253&&name=lightly-padded-cage-helm
https://www.wow-freakz.com/item_finder.php?item=151251&&name=steel-reinforced-cage-helm
https://www.wow-freakz.com/item_finder.php?item=151265&&name=blight-boar-microphone

Here's the boss:
https://www.wow-freakz.com/npc_finder.php?npc=122899&&name=death-metal-knight

Proof:
https://imgur.com/a/k8fhzgP
https://imgur.com/a/ByMAGgV
https://imgur.com/a/Z2qmd2I
https://imgur.com/a/FMyHTZC

You can also get some achievements for defeating this boss.
https://www.wow-freakz.com/achievements.php?achievement=11918&&name=hey-you-re-a-rockstar
https://www.wow-freakz.com/achievements.php?achievement=11921&&name=mosh-pit
https://www.wow-freakz.com/achievements.php?achievement=11920&&name=perfect-performance

As you can see, none of them have been completed by any players.

It would be awesome if you could fix it. Although I know it's not a priority, you're missing out on some fun stuff!

[Warbike]

It's a low priority bug but also part of 7.2.5 content

Blight Boar Microphone's chance is lower than retail (proof).