XDJ-XZ Master 2 Output not registering crossfader movements

This has happened numerous times:

Mix for hours. Master Output sounds fine. It's also my monitor.

Master 2 Output is being recorded. On playback, the crossfader movements did not register. It sounds as though I was mixing with the crossfader in the middle. 

Some tests determined that upon restarting the unit, the problem is temporarily fixed but goes back to sounding as if the "thru" option is selected vs the crossfader.

This is only happening on Master 2 RCA output. Not an issue with the Main Master XLR output.