I just soldered up a hobbywing Xr8 Sct to a Hobbystar 4300kv 550 sensored pro4 motor and I'm having a issue with a cog at low throttle. I tried unplugging the sensor wire and the cog went away. I have also tried another sensor wire and the result is the same. I'm thinking the motor has a bad sensor board, what do you guys think? Anyone else have this issue?