Forceful Arrow suddenly has a cooldown, bug or no?

I was levelling my rogue and when i hit lvl 14, I wasn’t able to use Forceful Arrow continously. It looks as though the ability has 1 charge and a cooldown of about 3 seconds after each use. On lower levels Forceful Arrow worked as intended with uninterrrupted firing. Possible bug or am I just a horribly stupid person?

Ya that just happened to me. lol. I was wtf am I doing wrong? Did I equip something that messed it up? But then later it went back to normal.

It’s the chaos perk:

Unstable Power

  • Chaotic magics erupt from your Basic Skills, making them guaranteed to Critically Strike and Overpower for 50-100% increased damage, but the power is unstable, giving them a 3 second cooldown.