Mark of the Abyssal Lord + Desecrated mod on same item

Steps to reproduce:

1. Desecrate an item
2. Use Essence of the Abyss on the item (and don't get lucky with the essence of the abyss consuming the unrevealed desecrated mod)

I had assumed that essence of the abyss MUST consume the unrevealed desecrated mod IF it would work at all, which I expected it not to, but curiosity took hold and I bricked an otherwise very good staff:

Bug Report ID: #3061355862

Item Class: Staves
Rarity: Rare
Behemoth Mast
Reaping Staff
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Requires: Level 78, 137 Int
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Sockets: S S S
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Item Level: 80
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Grants Skill: Level 18 Reap
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179% increased Spell Damage
+64 to maximum Mana
+5 to Level of all Spell Skills
45% increased Cast Speed
Bears the Mark of the Abyssal Lord (Used to be T1 Spell Critical Damage)
Gain 40% of Damage as Extra Cold Damage (desecrated) <- I did reveal this but only after using the abyss essence.

essence of the abyss removes a random mod and replace it with mark of the abyssal lord, the next desecration attempt will remove the mark mod.
Can you desecrate it again?

So, to be clear:

Desecrate -> Essence of the Abyss SUCCEEDS despite already having a desecrated mod -> Desecrate 'Mark of the Abyssal Lord' fails because 'item already has a desecrated mod' -> reveal desecrated mod reveals the desecrated mod -> Desecrate still fails because 'item already has a desecrated mod'

So, you just get stuck with 'mark of the abyssal lord' and you can do nothing with it.

This seems like a clear oversight bug, like, someone said 'oh we have to make it so you can't use Essence of the Abyss on items that are already desecrated' and then they forgot to make sure that included items with unrevealed desecrated mods.

I say this because there is a significant inconsistency:

If you desecrate an item without revealing, and then desecrate again it fails because 'item already has a desecrated mod'

If you desecrate an item and reveal and then use an Essence of the Abyss it fails because 'item already has a desecrated mod'

If you desecrate and item without revealing and then use an Essence of the Abyss it works?!?! But then you can do nothing with it.

oh got it now, definetely an issue if you cant desecrate it again,
probably because mark of the abyssal lord is not counted as desecrated.
can still omen of light, then desecrate to remove the mark and try to fix the staff somehow?