I use a generic text app I get off google play. Assign a tone to it (Beatles Mr. Postman). App would work great, until it does not do the ringtone anymore, although I still get text. After trying several things with no luck, I downloaded another text app from Google play and had my sound back again, until it doesn't play anymore. Strange thing, is go back to the first app and it works again.............until it just stopped playing again. So the question is pretty simple, why do I lose the notification sound on different apps, after they work for a while?

 

You know, don't even remember it or what it was called. I looked at my apps and only thing that could vaguely be it is INBOX. Might have deleted it??