Is it intended that at times i get Artorias' "buff" sticking and remaining for the whole run?

So, Artorias applies the "abyss" status, i believe multiple stacks actually. As far as i was able to tell with my reaserch, you get it by walking into some of his murky stuff.

As the buff states from the status tab, Artorias, being the gentleman that he his, lowers your defenses but in exchange applies attack up.

The buff/debuff has a visual indicator too, in the form of a black aura surrounding the character.

I've noticed my teammates having the aura and multiple iterations of the buff after the fight many times.

While preparing for the he Dreglord in the boss antechamber, i've noticed the black fume aura on a friend. They just had the thing, even multiple, separated (status wise) entries of the debuff. Didn't matter how long we've waited, the status persisted and never ended.

That happened multiple times, and im not able to tell if its intended. A couple times my friends were grabbed by the abysswalker while he died, so maybe knowing how grabs work could have to do with it. A grabbed ally used to ingore things such as Revenant's ult (i believe it got changed just with the dlc...?) So maybe somehow there's something finnicky like "if Artie dies while he grabs you, you "dodge" the debuff removal".

It could make sense,to a certain degree - he's right before the final boss and if you disrespect him, or if you're confident enough to trade defense for an attack up, you're locked into the stat trade. But at the same time i've had my fair share of whackness happening, such as facing the ever so mighty 4-dogs-quadricephalus, a paralytic Libra, and also a despawned one with a teammate under spawned under the arena.

Anyone having a clue?