Just for Me

I've had the priest book for ascension a few times but not getting the achievement.
Any one know if it's glitched?

Class specific books obtainable, and useable, only in Ashran

Druid
Book of Flight Form
Book of Rebirth

Priest
Codex of Ascension > Ascension

Warlock
Grimoire Of Convert Demon > Convert Demon

Hunter
Guide: Disengage
Guide: Sharpshooting

Rogue
Handbook: Pick Pocket
Handbook: Preparation

Warrior
Manual Of Spell Reflection (it does not work with Mass Spell Reflection, thank you capitao for letting us know!)

Monk
Scroll of Touch of Death

Death Knight
Sigil of Dark Simulacrum

Shaman
Tablet of Ghost Wolf

Paladin
The Jailer's Libram > Jailer's Judgment

Mage
Tome of Blink

These books drop from Ashran Rare Elites, which are found all over the zone, but can also be found in Ashmaul Treasure.

If I missed any, feel free to let me know.

Achiv is bugged i guess, tried to get it with Priest/Dk/Druid and couldn't.
I opened a ticket and a GM just gave it to me after checking i'm really eligible for it.
Do it before BFA or you won't get it.