I am going through this very same annoying issue.
Funny thing is that I’ve done that before on UE 4.27 and worked beautifully!
But now on UE5.1 when playing in the editor, everything works like a charm, but when I compile to Android and play the game on the device, the sound triggers on as soon as the app runs and there’s nothing I can do to prevent it from automatically play.
I tried to set volume, but it works only on editor, unchecking auto play works but the effect is the same, I can’t modify volume in any way.
I don’t know what to do lol