Today my wife complained that her screen was sometimes not responsive to her fingers. I checked it out and, sure enough, sometimes if I attempted to scroll down or zoom with two fingers, it would often take several tries. I rebooted with no change. This seems to have started today or at least today is when my wife first noticed it. She did install the new update a few days ago. There is a screen protector on it, but that hasn't been an issue before. It also has a smart cover. Any ideas?