Mindbender timer

There seems to be something strange regarding the mindbender timer when it is cast. When mindbender is out you can see effectively 2 timers(timer is located under the players health bar; like a totem). One timer is on the spell icon, while another timer is right below said icon. The timer inside the icon seems to be out of sync with the 2nd timer. The result is the timer inside the icon sitting at zero seconds for 1-3 seconds. This throws me off especially when talents like Inescapable torment are supposed to extend the timer of mindbender and I am unsure if my “pet” is still active

One is probably tracking it with the extend duration the other not