Tracks jumping back to beginning?

[noipod]

Running 5.2.1 (build 4428), Subsonic Music Streamer (Android), Android 5.01

I'm trying to determine why tracks added to a playlist will randomly skip back to the track beginning (ie if single track selected) or if multiple tracks selected, skip to the next track. For a single long track, it might play a few seconds, skip to the beginning, play a few minutes, skip back to the beginning, etc.

This only occurs in the Android player.

I did recently change phones which was running Android 4.X.X.

Any ideas on fix?

Thank you for any ideas in advance!