If you have a Google Pixel phone you probably know about its lock screen always on display. A change has occurred some time during the last week affecting always on display of my Pixel 4a at night. I am one of those people who sleeps with their phone on their bed stand, it’s basically my alarm clock. In the past, when in the dark always on display would dim but stay on enough to be seen and I woke up I could see the time. For the last several nights now the display has turned off and I don’t know why. I see that Digital Wellbeing has a bedtime mode where I can specify keep the screen dark, but I am not using that function.