Sleep Mode Turning Off on its Own
Recently there have been several occasions where I have turned my phone on sleep mode, gone to sleep, and sometime in the early morning a notification will get through and wake me up. At first I thought I was forgetting to set it on sleep mode, but last night I was very intentional in making sure it was on. My alarm was set for 8 am and I heard a single ding notification around 5:45am. I looked into my settings and the DND/Sleep Mode preference is already set across all devices. There are no app or phone number exceptions. When I woke up from, and went to handle the notification, I saw that Sleep Mode had at some point been switched off. Why did it turn off on its own? Now I know this has happened at least 3-4 different times within the past few weeks.
iPhone 11, iOS 16