[Death Knight] [Unholy] Pet's appearance issue

[Darkpressure]

WoW Freakz link: Raise Dead
Character name: Darkpressure
Bug description: Hello. I've got a visual/game bug with my character's pet.
A little backstory: back in 2019 during Legion 7.2.5 I applied a Glyph of the Geist for my UhDK which changed appearance of ghoul into geist. After the realm was transferred to BFA I still have geist appearance even though I do not have any glyphs applied right now. Changing ghouls appearance with other glyphs like skeleton one works fine, but when removed with vanishing powder it still returns into geist not the DEFAULT ghoul.

In other words: my pet is geist by default right now, should be ghoul because geist is only a cosmetic glyph.
Yesterday I applied an in-game ticket and GM Arkodz tried to help me with this issue, unfortunately to no avail. By his words he saw a ghoul with GM's privileges, after removing them the pet changed into geist.
I deleted cache folder, did unstuck, applied other glyphs in different order but it seems to be a server side issue.

Proof: Have a look. You can see my pet is a geist. I used vanishing powder at first to show that there's no cosmetic glyph active.
If you need any additional proofs feel free to contact me via DM either here or in-game.