FeenixServerProject/Archangel_2.4.3_Bugtracker — Issue #289: [Mage] [Talent] 'Combustion' Bug when removed manually 
Author: neo2k12
Created: 2012-02-06 22:50:42+00:00
State: open

So normally, when you cast Combustion, the buff remains until you've critically hit three times with a fire spell. Also, the cooldown isn't triggered until the buff fades off.

But here, when you cast 'Combustion' and remove it by right-clicking the buff (for whatever reason), it fades off, the combat log confirms 'Combustion fades' but it doesn't trigger the spells cooldown. Instead, the next time you cast a fire spell, you suddenly gain the buff again and it works as if you never removed it.