I’m having the same issue. Until beta 5 or 6 the custom sound file wouldn’t even play and it would only play a system sound. I’m hoping this is still just a bug and they fix these issues but I’m not sure what to expect.

does it have to be a .caf file, or a certain duration sound file? mine is a .wav file.

@Engineer how do alarm apps like Wakey or Alarmy get alarm sounds to play when the mute switch is enabled without using critical alerts?