1. If the track is skipped without any audio impact:
a. make sure you're not involving WiFi from Lumin to the router to your source for music data.
b. If you're using a USB drive, move it to a computer or NAS, install the free MinimServer there. In router reserve an IP address for the MinimServer. In Lumin app choose MinimServer as library. Clear your playlists and rebuild them.
c. If you're experiencing this with Tidal or Qobuz, it's caused by a login issue or the track is no longer allowed to be streamed.
2. If you experience a strange audio sound before skipping, check the track file itself, or repeat playing the same track. Also check the network infrastructure.