Combustion not reseting cooldown

I've just checked today that whenever I use my combustion, it works fine, but the cooldown never triggers off. It stays forever on cooldown and I can only get to use it back if I log out.
Also, if I use it, log out and come back, it refreshes the cooldown, even if I've spent less than 3 minutes logged out. That could be exploited in some ways (you can actually have combustion up every minute, or even faster)
Checked with another fire mage to see if it was not my problem, he said it was working before but today (24/11/2015) he noticed that it started working as I described here.
Anyone else having the same problem?
I've already created a topic on the bug report system.
Thank you
Also, if I use it, log out and come back, it refreshes the cooldown, even if I've spent less than 3 minutes logged out. That could be exploited in some ways (you can actually have combustion up every minute, or even faster)
Checked with another fire mage to see if it was not my problem, he said it was working before but today (24/11/2015) he noticed that it started working as I described here.
Anyone else having the same problem?
I've already created a topic on the bug report system.
Thank you