Since installing IOS 26, I've caught my phone doing this 3 times during the night: The screen slowly flashes on and off, but very dimly. a dim status bar and any un-acknowledged notification on the phone slowly appear and disappear about every 3 seconds. But the main screen stays black, no time appears, no date for instance. Just a dim status bar and the last notification. They slowly flash, until I reboot the phone. I thought maybe it would be fixed with 26.0.1 But it happened again after the update. I have an iPhone 13 mini, and otherwise it's functioning fine.