Node-2/Spotify L-R channel swap?


I recently noticed that while streaming with my node2/Spotify it seemed that channels seemed to swap L to R/R to L. Resetting the node2 does not change the effect. The channel change only happens occasionally, e.g. one day it is correct, the other day reversed.  I usually use the a separate DAC with the node 2 but tried the analog out of the node 2 as an alternative to zero in on the issue. Using the built-in DAC yields to the same result. I then listened to the same piece of music via my iPhone/Spotify - so completely independent from my home setup) and again got the same result. 
One of the music pieces I listened to: The Modern Jazz Quartet/European Concert: vibraphone right channel, piano left channel (correct channeling)

Does anybody here have had same or similar experience?  

agosto
Unfortunately it is happening on my system. Would be nice if somebody could stream the same song of the mentioned recording (“Django”) multiple times within a few days and try to replicate my observation.
I could see how this could happen with a compression algorithm that sends both a sum (L+R) and difference (L-R) signal.  Doing the math a little wrong here could end up with swapped channels, but I've never heard of any code that arbitrarily does it right sometimes and not others. :)

Best,
E
No comment/input? 
I know it perhaps sounds strange, but the channels swap L-R frequently and randomly. No one ever experience that?