Android app stop playing

[pixel24]

I've tested various things. It seems to be related to the screen lock. As soon as the screen lock is activated, the app plays the current track to the end and then stops.
In the Admin UI, I see the message "m.girlfriend was disconnected from Pixel 6 Pro". In the logfile, I see:

Code:

Jun 24 10:49:03 media02 jellyfin[682]: [10:49:03] [INF] User policy for m.girlfriend. EnableAudioPlaybackTranscoding: True
Jun 24 10:49:15 media02 jellyfin[682]: [10:49:15] [INF] Sending ForceKeepAlive message to 1 inactive WebSockets.
Jun 24 10:50:03 media02 jellyfin[682]: [10:50:03] [INF] Sending ForceKeepAlive message to 1 inactive WebSockets.
Jun 24 10:50:51 media02 jellyfin[682]: [10:50:51] [INF] Sending ForceKeepAlive message to 1 inactive WebSockets.
Jun 24 10:51:19 media02 jellyfin[682]: [10:51:19] [INF] Playback stopped reported by app Jellyfin Android 2.6.1 playing Enjoy The Silence ⁄ Interlude #2∶ Crucified. Stopped at 372800 ms

In the app settings (Android), "Background usage" is enabled for Jellyfin.