Tempo jumps to 160bpm while crossfading.

 Hello RX'rs!

Anyone have this challenge? While mixing with the crossfader, and having the sync function engaged, usually right about  the time I am about to finish the mix with the crossfader, the track I'm about to bring in, jumps up to 160 BPM.

As you could imaging, it doesn't sound all that great. I

This happen's frequently, and always during the middle -to the end- of my crossfade mix...  and this makes me wonder, does the XDJ-RX computer know that the crossfader has passed the middle of the mix, and then some sync function, that  I'm not familiar with, take over?  

Thank you in advance,

-J