I've been mostly enjoying my new iPhone 6 the past few days, but one thing I have encountered a handful of times is that the screen doesn't react sometimes to my touch. Whether email, browser, a game, whatever...sometimes it will not pick up my taps or swipes. Doesn't appear to be locked up, but a lag or just not reacting. Anyone else encounter this issue? Never had a problem with my 5 or 5s.