Thanks. Have been doing some research and a bad cable could result in a behaviour similar to what I am experiencing.
Based on a previous comment stating that it was a known issue to be fixed in latest version I had postponed its replacement.
Will try a new one to verify if the issue is solved.
Switched the cable for a new one, Belkin High Speed, and the issues seem to be solved so far.
Have not experienced any problem for 3+ hours of playback.
Thank you for the help and suggestions!!