iOS 10 introduced a new way of unlocking Touch ID-capable devices, requiring you to press the Home button to unlock the device and get to the Home screen. This, coupled with the new Raise to Wake feature can make for a nicer experience, but like every new interaction, it can be confusing, annoying, or just hard to break the habit.
Users who don't like this 'Press Home to Unlock' feature will be happy to learn that there is a way to turn this off and take things back to the way they were before iOS 10.