I have tried EVERYTHING to get my Samsung Watch to be completely silent while sleeping. I have set up nightly automatic DND mode, and have also tried turning on all three silents modes: DND, Theatre Mode, and Goodnight Mode. Nonetheless whenever I move my arm while sleeping the watch will wake up, vibrate and make some kind of notification noise. This is extremely irritating and I don't understand why it would do this while in DND mode (and the other two modes as well). Please help. Thanks.
@Ian47: Have you tried enabling Silent Mode? On the Quick Panel, tap the speaker symbol until a line is drawn through it (this can also be done via Settings > Sound and Vibration > Sound Mode. I also recommend disabling Wake Up Gesture manually to see if this helps - Settings > Advanced > Wake Up Gesture.