My Do not Disturbed suddently stopped working. I got a call and a WhatsApp call in the middle of the night that woke me up. I even tested this myself by manually turning on Do not Disturb and trying calling myself. Sure enough , the phone started ringing with sound. And I do not have any exceptions besides Alarms enabled.
It seems like the do not disturb schedule does not work. It is almost like it doesn't recognize daylight savings time, or is in the wrong timezone. So it always arms and disarms the dnd incorrectly.