So in my Garmin Connect settings I have my sleep times set from 9pm to 4:10am
Since I got my Fenix5 every night at 7pm I wont get notified via vibration of messages etc. I look down and see this ZZZZ icon on the watch. I go into the Wheel and turn DND off the symbol goes away and my notifications return correctly.
This never happened on my Fenix 3 so I am thrown off.
To me sounds like a time zone issue or something. I have looked all around the Garmin Connect App, Dashboard etc.