After moving to iOS 11 I find that the Bluetooth symbol at the top of the screen shows that the phone is connected to Bluetooth. I do have a Jabra Bluetooth speakerphone in the car, but it automatically disconnects after the car sits idle for a few minutes. This only started after upgrading to iOS 11. I've tried turning the phone off and back on, and tried a hard reset. There are no other Bluetooth devices that the phone connects to. Battery life seems to have degraded significantly and as of right now I'm blaming it on this issue. Any ideas?