Burning Blade Medallion quest

Pet flies in textures, cannot be dismiss. Mobs do not moves to player

Burning Blade Coven, Burning Blade Medallion quest

It was about 30min ago on covenant-wow.com, server "Cosmic Ray"
Player warlock Humanizator with imp.

[table="width: 90%"]
[tr]
[td]Coords[/td]
[td]Behavior[/td]
[/tr]
[tr]
[td]44 53[/td]
[td]Imp flies throw cell ans start fighting[/td]
[/tr]
[tr]
[td]44 52[/td]
[td]Invisible wall for mobs, they do not go to player and their health reset to max value after my spells.[/td]
[/tr]
[tr]
[td]44 52[/td]
[td]The imp is nowhere, I cannot dimiss him[/td]
[/tr]
[tr]
[td]43 52[/td]
[td]The imp is nowhere, I cannot dimiss him[/td]
[/tr]
[tr]
[td]44 56[/td]
[td] Dismiss and call imp, still flies in textures.[/td]
[/tr]
[/table]

Behavior is strange, but quest can be completed without imp.