First, make sure that Map Pilot is the only drone app that is running.
If that still isn't working you are best off trying to address the issue in DJI Go which has more diagnostic capabilities.
You can try to blow any grit out of the tilt axis which seems to be more susceptible to blockages. Also, give it a few manual rotations while the aircraft is not powered up to see if that clears anything out. Beyond that, you will have to contact DJI.