Serpent's ability to decrease bleed duration is bugged?

When serpent is inflicted with a bleed debuff, the duration of incoming bleed debuff is reduced by 90% (according to the text in his abilities). However this does not apply in aw/ bgs where opponents might have deep wounds activated. I tried this by using Nick fury against serpent in practice mode where Nick's bleed lasted way longer than it was supposed to.
Also in tile 3 of aw which inflicts bleed based on armour up buff, bleeds inflicted on him last longer than they are supposed to even if opponent has 5/5 deep wounds.

Heres some quick math:
Base duration= 5 sec; max deep wounds = 3 sec.
Total duration = 8 sec
Incoming duration = 0.8sec (90% dec)
But incoming duration is lot longer. (About 2 - 2.5 sec with nicks 4th light)

Is this intended or bugged?

Comments

Graves_3

Serpents ability applies to base duration. Before the enhancement from masteries. So 90% of baseline is about 0.5 which then adds on the 3 seconds from mastery.
I think this is how it works. I am not sure if this is exactly how it’s supposed to work. Considering it’s been this way forever, my guess is that it’s intentional.

Furrymoosen

https://forums.playcontestofchampions.com/en/discussion/comment/2883931#Comment_2883931

Close enough at least. The order of operation is:

Effect, champ ability, mastery/node.

So if you start with a 1s bleed, you then reduce it to 0.1s. After that you take masteries and nodes into account. If there's a 100% increased debuffs duration, then you would add that time on after the reduction, so a 1s bleed would become 1.1s. If they have max deep wounds, then a 1s bleed would become a 2.6s bleed and so on.

And this is across the board with all duration and potency reductions. The amount of reduction is according to the base ability, and then increased duration or potency take effect after the fact.