Do not disturb

[JS1864]

I have an s22 ultra and recently I've noticed it behaves as though DND mode is enabled (no sound alarms or notifications between 11pm and 7am). I have never enabled DND, it is currently saying 'off', there is no schedule defined, and yet... no sound over night. Any ideas?

[Tourbillon De La Vie]

Modes and routines enabled?

[JS1864]

Nope. None set.

[Tourbillon De La Vie]

Do you have battery guardian app

[JS1864]

No. I'm at a complete loss to understand what's happening. It used to be fine maybe 4 months ago, and I've not changed anything other than the usual samsung and app updates

[Bindex]

Are you checking Do not disturb within the notification setting?

[AndrewL]

@JS1864: Are you certain that Sleep Mode is not scheduled to activate in Modes and Routines? The default time for this mode to be active is 8 hours, which matches the timeframe that you have reported, and enables Do not disturb as part of the routine. 

To check, head to Settings > Modes and Routines > Tap on 'Sleep' > Check to see if a schedule is active

[JS1864]

Definitely not active.

[JS1864]

Yes

[Bindex]

Have you updated your phone recently? I would suggest enabling it and then disabling it to see if that prevents it from becoming active.