I’m happy using my Samsung Galaxy S8 with e dreamlte 0.9-2020062560240. There is only one problem considering the Musik App Vers. 3.0: It just plays the right channel. When I change in the settings to Mono-Audio both earphone speakers play (just mono as it has to be:-)). When I set the mono troggle to off, the current playing song is in stereo - but the next song playing there is just the right channel.
I tried some other music player apps - the same problem! But the RadioDroid app (for internet radio) works correctly in stereo.