So I was at my weekly gig and when I went into my first transition, the crossfader and up faders have become unlinked, even after rebooting, clicking the "link" and unclicking to try and link them back up and nothing. thought it might have been a software update issue so updated to the latest SL update and still nothing? Why has my 57 unlinked itself for Video-SL? What can I do to fix this issue?