I tried restoring the phone for the problem I had here https://forums.macrumors.com/threads/467954/ it did no good and actually seemed to get worse today. E & S and when switching email accounts. So head to the mall and get lucky. A. great weather day outside = no customer in the store (actually 3 but normally 40) B. no one in line at Genius bar C. last but not least it still was doing it when I got to the store. No probem loooks like the left side has issue we will get you a new one. I know not really new but shinny new and clean to me 
just thought I would share.
just thought I would share.