ok guys u will all recieve "the medicine" for this "illness " this christmas
it`s very simple : the roll (horisontal) motor is is out of magnetic ballance this may occure after a crash or a phisical shock at a transport (i had this problem after my first crash). also i think this is a design flaw because the shaft is not super fixed to the magnet housing or the gopro mount is not fixed to the motor shaft.
1. power up solo +gimbal + gopro
2. whait for it to start acting like a drummer

3. grab with one hand the camera and with the other grab the back part of the motor (where are the magnets) also called motor housing
4. couter twist the camera and the motor housing until you will feel that the coil is allignd with the magnet
5.this is all
if you don`t resolve it i will make a movie.