Has anyone else experienced this with the new home button on the 7 or 7+? Around 80% of the time the button press feels normal. Every so often, however, the button has a subtle vibration right behind the click, which feels like a tiny buzz. I'm not sure if something inside is not aligned properly, or if it may be software related. I can't accurately reproduce it, it just seems to happen randomly. Has anyone else had this happen, and if so, did you exchange it, or reach any other resolution? Thanks!