I have the same issue. I bought unlocked S9+ from best buy and almost all the music apps get paused spotify, Youtube, etc.
I would not have bought this if I knew this issue earlier. Definitely will recommend others to not buy this phone if this issue is not getting fixed, its frustrating will music get paused without any reason.
The setting you're looking for is in the Settings > Device Care > Battery > "..." > Settings > Sleeping Apps > Select Music App (Or any app) > Battery > Allow Background Activity (Toggle)
Could they have burried that any deeper? I think not.
Here is the samsung link that got me in the neighborhood.
Hope this helps.
I too am having the music pausing issue. Any music app pauses when I receive some message or other app notifications sometimes the music resumes, sometimes it doesn't.
Most annoying is when I receive a phone call and the music never resumes!
Model S9+: SM-G965U1
Hey, I am also having a lot of trouble with spotify randomly pausing on my S9. It is extremely frustrating. I use bluetooth at work, so maybe it is something to do with that.
Model number: SM-G960U
Carrier: AT & T
Hardware version REV 1.1
Unlocked phone, Mint Mobile carrier.
When the screen times out & goes dark, Music Choice app goes silent. 5 minutes of music, that's it. I don't have the weather app that affected another user's phone. I don't have any other music app. It's as if the app stops unless the screen is active. Have been falling back to my s7 Active & am wondering if I should return this phone & stick with that one. There are too many variables among all the users here with the same problem. Doesn't anyone test new phones with real world use before they're released?