Gain Frenzy Charge every 12 seconds on armor implicit problem

If you are lucky enough to get exceptional tier roll as shown in the screen shot and allocated 20% increased frenzy charge duration you have a situation where you have charge duration of 12 seconds and it gets generated every 12 seconds. What looks like happening is it randomly chooses which happens first, charge expiration or charge gain. You see the number either going up to two or staying at one.