I've already had one 7+ replaced for several different malfunctioning reasons (mainly battery) and now my non-refurb replacement is having a different issue. I can't remember exactly when it started (perhaps 10.1 public release) but I'm now on 10.2 Beta 1 and the problem persists. Once every day or so when I bring up the app-switcher my screen becomes completely unresponsive. All of the physical "buttons" (looking at you, home "button") still work, so it's not like the phone itself is freezing. Has anyone else experienced this?