Why is there sound in the app? – Manga Reader App Review

Can’t listen to music while using the app, bc for some reason it always cuts of to make room for the application’s own ”sound”?? When I pull up the music player, instead of the track I was listening to it simply shows ”Manga reader” as if I was listening to this soundless app, and I can’t listen to my own music at the same time??
Review by keijokaks on Manga Reader App.