Notification Sounds Disappear Overnight

[Mesbah]

Notifications sounds disappear overnight and remain so until a reset or even reset many times is not a remedy.
I suspect this is due to malfunction of Quiet Hours app that appears to be a bit stupid to wake up sounds. :grincry:

 

[k1s23]

hey there are you in the insider program? i had that happen to me also in the latest build for the fast ring.