I have had this problem since upgrading my Galaxy S7 to Nougat, but I am just getting around to posting here because I can't find any helpful information elsewhere.
I acknowledge that I could be missing something, but I have spent a lot of time trying to solve this problem with no success. Ever since I upgrade to Nougat I find that the volume for my notifications and alarms will go silent, even when the volume sliders show that they are on. Just now I got several notificaitons. My phone did vibrate for each of them, but they should also play a sound for each one and it did NOT. I looked at the volume settiings, and all volume sliders were at 50%, except for System, which is at 100%. "Do Not Disturb" is OFF. Typically, restarting the phone will fix this problem, but just now it did not. Some notifications came in that should have triggered a sound, but no sound was played - it did vibrate though.
This also happens to my alarms, which really sucks when it comes to waking up. I have overslept a few times because the alarm volume went silent. I even tried a different alarm app, but it still happens.
Is this a known issue from the Nougat update?
