Very interesting Soul Swap (PvP talent) interaction with Unstable Affliction (PLEASE, BLIZZARD, DO NOT REMOVE FUN)

After a bunch of testing, I noticed that the Unstable Affliction copy that originates from Soul Swap maintains the duration of the original Unstable Affliction, however the copy's stacks all attain that duration instead of maintaining their individual durations. I confirmed that this is reflected onto their damage (i.e. it is not simply a tooltip/visual bug).

I'm fairly certain this is not the intended behavior, however it opens up so much play potential that I think Soul Swap is finally a viable talent now.

To exemplify, imagine two targets, A and B:

00'' - UA applied to Target A; will last until 08'' (stack 1). Total UA stacks on Target A: 1. Duration that is shown on the debuff on Target A: 8s.

01'' - UA applied to Target A; will last until 09'' (stack 2). Total UA stacks on Target A: 2. Duration that is shown on the debuff on Target A: 8s.

02'' - UA applied to Target A; will last until 10'' (stack 3). Total UA stacks on Target A: 3. Duration that is shown on the debuff on Target A: 8s.

03'' - Soul Swap on Target A/Soul Exhale on Target B. Taking the remaining times based on Target A, I expect stacks 1, 2 and 3 that are on Target B to end respectively at 08'', 09'' and 10''. Total UA stacks on Target A: 3. Total UA stacks on Target B: 3. Duration that is shown on the debuff on Target A: 7s. Duration that is shown on the debuff on Target B: 7s.

(...)

08'' - Stack 1 on Target A falls. Nothing happens to the stacks on Target B. Total UA stacks on Target A: 2. Total UA stacks on Target B: 3. Duration that is shown on the debuff on Target A: 2s. Duration that is shown on the debuff on Target B: 2s.

09'' - Stack 2 on Target A falls. Nothing happens to the stacks on Target B. Total UA stacks on Target A: 1. Total UA stacks on Target B: 3. Duration that is shown on the debuff on Target A: 1s. Duration that is shown on the debuff on Target B: 1s.

10'' - Stack 3 on Target A falls, ending the debuff. All stacks on Target B fall, ending the debuff.

Total time that Target A was with three stacks of Unstable Affliction: from 02'' (time of application of the third stack) to 08'' (time of ending of the first stack) => 6 seconds

Total time that Target B was with three stacks of Unstable Affliction: from 03'' (time of Soul Exhale) to 10'' (time at which the copied Unstable Affliction debuff was expected to end, given it's original duration) => 7 seconds