I have the same problem on Nokia 5, no sound at all after enable/disable 'do not disturb' mode. Only 'soft reset' helped.
Wa there any solution to this? I have the same issue with my Nokia 8. Ringing sounds are gone after a while and only return after a soft reset or reboot.
I’m not happy at all with my Nokia 8 after Oreo 8.1 upgrade, Dot notification is not working there is no Dot and no counter for any kind of notification (SMS, Email, WhatsApp, SnapChat, Facebook,.....) also notification sound is not coming for all.
I have reset factory my Nokia 8 5 times since I bought it, then I did a downgrade to Android 7 I noticed there is no such issues, all notifications where coming properly with counter dot on each icon.
But there was a ready update only waiting for a restart, I tried to not restart my device but it happened and I’m now again suffering of very bad Mobile Nokia 8 with latest Android is my worse thing I did in my life
Need your help urgently