After updating to iOS 9.2.1 on my iPad Air 2, it seems that on random occasions it reboots. The thing is, I never actually reboot it, which is why it's weird. Sometimes, I'll put my iPad to sleep or close the cover of my case to turn the display off, and when I turn the display back on after even just 10 minutes and try to use the Touch ID to unlock my iPad, it will say the 'input passcode before using Touch ID'. This doesn't happen every day, but it happens a multiple times each month. Other things like this will occur, where my Wi-Fi signal doesn't show up on the lock screen because 'the device needs to be onlocked with a passcde first', or my text replacement shortcuts suddenly stop working (but the shortcuts are all still there). Sometimes, settings that ask "Allow X app to use microphone/camera/photos/etc" will appear again, even though I already agreed to let apps use these functions. Nobody is physically messing with my iPad either, so someone screwing with my settings is not the case. I also noticed that my iPad doesn't sync with iTunes anymore. It says that it cannot read my device or that it's corrupted, so I can't back up all my notes and app data that I keep on this in order to do a factory reset.
I would really like some answers as to why my iPad is doing this. All my other devices are fine, but most are running older firmware (iOS 8.X.X) and they can all be synced to iTunes fine on the same computer I tried to sync this iPad to.
iPad Air 2 running iOS 9.2.1
