Standby screen changing on its own overnight
This is just odd behavior, doesn't make the phone unusable or anything, just mildly annoying. I have an iphone 15 pro max. Latest ios. I set my standby screen to the full screen digital clock. At some point around midnight, it changes itself to the default (I think) half and half screen with the clock face and the calendar. This only happens when on a magsafe charger, every time a magsafe charger is used. If I use any other charger I have, everything behaves as expected, and it stays the full screen digital clock the whole night.
For more details, I wake up often throughout the night, and just anecdotally, every time I've woken up before midnight, it's still the full digital clock, and every time I've woken up after midnight, it's switched screens, so it seems to be happening around midnight. When I notice it's happened, I switch it back to the screen I want, and it stays for the rest of the night.
The first few nights I had the phone, I just used a generic wireless charging stand that I've had for years, and everything worked as expected. Then my magsafe charger arrived and I started using that, and that's when the odd behavior started, so I put two and two together and started trying a bunch of different chargers to test. Again, the issue happens every time I use the magsafe, and only when I use the magsafe. It's an official apple magsafe charger, plugged into an official apple 20w usb-c power adapter, purchased from the apple store. I only have one to test with, so it could just be defective somehow. No idea what would cause such a strange thing though.
iPhone 15 Pro Max, 17