Diablo® III

I'm soloing on HC and using the Templar as my follower. When ever I have a mantra active, I see a tiny icon at the top close to his portrait. At first I thought my monitor was messing up and pixels were flashing but I stared a while waiting for it to do it again and realized it was my mantra. I don't know why it does it or if it only does it on the Templar. It's annoying fighting and it catches my eye. It's like a blinking alarm clock in the dark. Anyone else experienced this?

Same thing happens to me on both HC and SC with any follower.