Its the cable! I had the same problem, the controls were jumping randomlly! In my case the problem was in the connection of the two cables i.e. the jack that connects the USB part with the Radio part of the cable. There was a short-circuiting going on. I soldered a new jack. Problem gone!
Initially I was realy disaponted

as I had high expectations from Reflex. Fortunately I solved this quickly and am now able to apreciate the REALITY of Reflex tothe MAX!
Deemoss