Bike doesnt move properly when i pedal

[Brewster]

I just experienced the same issue as a new user and found a solution. It might have something to do with how your sensor is initially set up (Cadence vs Speed). I would switch over to the opposite setting to what you have now (if you have Cadence switch to Speed or vice versa)  and remount your sensor the same way you had it before.  (which is what I did to solve my issue).