I have both V3 and V2 on different bikes. I have noticed on the L/R Balance with the V3 I get a number of 100% Left readings and no (or very few) 100% Right (as far as I can tell). These seem to correspond with zero cadence. Looking at Vector 2 L/R balance I get odd points at either 100% left or 100% right that seem to correspond to zero cadence, although there seem to be a few more 100% Left (maybe). Although on brief inspection it seems there are more of the V3 100% Left that the 100% points on the V2, but I wouldn't put money on it.
I don't know what causes these. I guess it could be when I return to pedalling after freewheeling. On a quick look they do seem to occur on descents (again no guarantee that this is always the case).
I have both V2 & V3 and overall power/NP/Cadence seem to be similar as far as I can tell.
Is there any reason why the V3 and the V2 should behave differently with respect to the 100% Left readings?