HTC One M9 :: Phone Cycling Through Running Apps By Itself

Occasionally when using my device, it will freeze for a brief moment and the running apps window will pop up by itself. It will then start cycling through the running apps list (I use the card view), and it will randomly open one of the applications, and then sometimes repeat this process a couple of times in quick succession before I can regain control of the screen. The whole event will usually last about 3 seconds, but as you can imagine it is becoming quite annoying. I would say that it happens about every 3 days or so.