If that's the case, how come it is one of the only music apps that doesn't stay alive? Even Bandcamp runs in background when you close all apps. I even forced spotify to stay alive after closing all apps and still no avail.
Re: Keep Spotify playing when closing all apps in task switcher?
I have a solution, and it may or may not work on phones other than the Note 8 or the S8 from Samsung, but I'd give it a look anyways. I have a note 8 with android 7.1.1 for reference.
1.When you open your active apps (the button on the right or left from the home button) you have to go into the active apps options ( in my case it's the three dots on the far right at the top of the screen) and activate the "lock apps" button.
This allows your Spotify or any other app you select from the currently active apps to stay open after pressing the "close all apps" button. To close Spotify with the lock, you have to manually swipe it closed, unless of course, you decide to deactivate the lock.
The cool thing is you don't need to reactivate the lock every time you swipe Spotify closed, as it will keep the locked setting. I hope this helps!
that worked ... in my case I clicked to the left of the home button to display current apps. There was a lock icon on the top right corner of the Spotify app. Clicking to "lock" fixed the problem. Thanks!