DDJ-SB2 Roll Functions causes reset

Not sure if others have found this, but the very first time I select the roll function  (on either channel, 1 or 2) by pressing the Shift plus AutoLoop, the DDJ-SB2 resets (lights flashing like at start-up). I only use Rekordbox, so not sure if it's just that or the controller.

Basically the first time you select the roll function, the unit resets, the sound stops for a second or to and then everything is fine. It only seems to happen the first time the roll function is selected, from then on after the reset the Roll function can be used at will.

Simple workaround is to get the reset 'out of the way' before live playing. Problem is 2 tracks into a set is to late to then 'Reset' and have a 2 second dropout. (I use the roll function a bit as it goes well into my style, so is very important to me)

I bought the ddj-sb2 to take on the road, leaving the xdj-rx in the studio. so I'm a bit stuck now (unless I lag the xdj-rx around in a flight case....)

Anyone else seen this?