[BUG?] Phase Punch cooldown is faster in Algalon P2?

[Decimary-illidan]

I think the cooldown of Phase Punch should be 15s in the whole fight, but I notice the time interval between two Phase Punch in phase 2 is less than 15s (around 11s) in several logs in this week. I checked logs in last week and didn’t see such issue. Fight in phase 1 doesn’t have issue neither.
As far as I know, this issue appears in two cases:

1. after 3rd Big Bang in phase 2
2. after switching tank in phase 2

I assume it happens when either the target of Algalon is changed, or when someone taunt Algalon in phase 2.

Is it an intentional change? or a BUG produced recently?

[Aluminor-dalaran]

Just faced this bug, tank got sent into shadow realm 5 seconds early. Resulting in a wipe. (P2 boss around 10%)