Music randomly stops playing

[jsup01]

Plan

Premium

Country

Germany

Device

(iPhone 11)

Operating System

(iOS 13.5.1)

My Question or Issue

For quite some time now, when my phone is locked, music randomly stops and starts playing, stops and so on.

I already tried deleting, re-starting the phone and re-installing the app.

I closed all apps but Spotify. Nothing works.

I hope you can help me, because it's starting to get on my nerves.

Thanks in advance.