There is a bug in the new Version of your app.
the playlists can not loop itself from the last track to the first track if using single-loop.
it's normal when pressing next bottom during all track but the last. when playing the last track I can't press next anymore, it supposed to be back to the first track of playlist but it ends.
Comments
More info:
https://musicspeedchanger.com/forum/discussion/296/controlling-playback-using-the-playback-mode-repeat-button