In recent raids my Warlocks had noticed that their corruption was getting knocked off by something but we were unsure what. A couple of weeks ago a few of us starting looking into logs and there seemed to be instances where consecrate was timing up with a corruption falling off the boss.
Today the same thing happened, and after checking the fight logs and manually adding up the debuffs it appears that consecrate is actually counting towards the debuff slot limit.
I can’t link the logs here, but in this instance we’re only 10 seconds into the fights and only have 16 potential debuffs on the boss
Curse of Shadows
Curse of Elements
Judgement of Light
Shadow Vulnerability (5)
Curse of Recklessness
Winters Chill (4)
Sunder Armor (3)
Judgement of Wisdom
As the second consecrate applies, one of the corruptions fades.
Consecration is taking up a debuff slot I have no idea if this is intended behaviour or not.
In Patch 1.9.0, it states the following in the Paladin section
Consecration - No longer displays a debuff icon on targets in the area of effect.
No longer displays a debuff, may mean it still counts as an invisible debuff - Blizzard can you please test this on the reference client.