Sorry to hear you experiencing problem with the LP-16.
I would like to ask you to check you already using the latest firmware release on your LP-16 (83859)
-When you try to playback the song from the uTool that playing back the right length of the song?
-Unfortunately there’s one problem on the LP-16, if you try to use different length of tracks in the song, the playback will be stop at the shortest track length. We will solve this issu with the next firmware release.
We are sorry for the inconvenience.