Originally Posted by dan_vector

It won't be incorrect connection as the previous poster describes as the system works fine when driven smoothly. The issue you describe occurs only from a dead stop start.

If you've changed the sensor wire and still have the same problem it could be a bad sensor board and so if you have another motor try it. If that still doesn't work then it is also possible that it could be the lipo not providing enough initial current to start the motor flat out from a dead stop. However the symptoms you describe points to a sensor issue either the wire or the motor sensor board itself.