Hi,
I think this is due to the cable that I am using (mini headphone to RCA), but I don't have another one to test (JD Labs DAC is on the way).
Audio occasionally drops in right channel. Removing the mini headphone jack and reinserting brings it back. I have tested the audio and it is not mono. It is also not like 12 in the FAQ. All voltages and resistance test well.
Stereo lasts for a while - about an hour or so - before dropping. I am not moving around. I have cleaned the connector and treated with Deoxit.