Hi All - I need some advice. I believe this started with the iOS 9 release. At purely random times, when I unlock my phone first time in the morning, it won't accept my fingerprint and requires my 6 digit code to unlock. I'm assuming the phone is rebooting overnight or is something else causing this? This only happens randomly and always the first time unlocking in the morning. This has never happened at any other time of day. Any thoughts?