Yesterday afternoon my iPad 4 started doing weird stuff - I press an icon to launch an app, the device switches to it, then about a second later the screen goes black and the white Apple logo appears in the center as the iPad resets. I've reset myself, charged it overnight, still the same issue. When I turn it on I see notifications of new emails, etc, and everything is fine until I click an icon (I've tried many of them). The app launches, about a second passes, then black with white Apple logo. Any thoughts? Do I need to reset it to factory status and then start adding back in apps and data?