Tell me about it. For years I have used DnD on a time schedule to silence the phone at night. Today it woke me up in the middle of the night when some emails arrived, because iOS 15 did't carry over the DnD schedule. Then I had trouble finding where in the settings the feature now is, all at 2am and barely awake.They did carry over what was already setup for DND, either. I had to go through and select those notifications I had defined previously after the update. Didn't know this until notifications began coming through after I had gone to bed. Very frustrating!