I have this notification banner on my home screen that won't go away. I tried to upload a screen shot, but I keep getting an error and it won't upload. Anyways, it says "Calls and notifications will be silenced until 6:20 am." It's well past 6:20am now, but notification persists. My phone automatically goes into DND at 8pm every night goes back to normal at 6:20am. As soon as I installed iOS 12 I got this notification, and it will not go away. Any ideas?