Originally Posted by
peetpan I have DND turned off, like... in general!

I believe you should mess with the schedule AFTER you enable DND. Why would I tweak the schedule if DND is off.
My whole issue is that even DND being OFF, it turns itself ON at night.
I was asking if it was accidentally turned on. You don’t need DND switched to on for the schedule to kick in. It’s automatic which is why I asked. Just trying to help you find the problem.
I would check “Bedtime” as a PP suggested.
Also, try turning schedule on and see if Bedtime is checked under there. If it is, switch it off then switch “scheduled” back off.