Spotify disappearing from the notification screen (ANDROID)

[MNC1]

Hey when i use spotify on my samsung S9 the app stays on the notification screen but as soon as i pause the music, lock my phone and wait 10min the app disappears from the notification screen and i have to restart it. I would appreciate if you guys have a solution or workaround for this. Thanks 

[MNC1]

here's a screenshot that shows the app on the notification screen top left (https://imgur.com/a/SCBCEOn) but a soon as i pause the music and lock my phone it disappears. Thanks