In multiplayer my sister used adrenaline and it expended AP and did not receive effect. so far this occurred once and haven't happen since then.
I started a new character and I have frequently seen Adrenaline consume the cooldown and grant no additional AP or buff. The same frequently occurs when using Flesh Sacrifice. I find this very odd, because I used these abilities numerous times on my previous character and never encountered this bug before, and I have had it occur several times already on the new character. Generally, reloading and using the ability again will cause them to work the 2nd time.
