It looks like the MJ prop is too long for it to be able to pop out and correct itself. Maybe if someone tried making a Dumas or octura prop as short as the stock prop, when the prop would start backwards, the reverse motion and flow would pop it out like the stock prop is designed to and allow it to correct itself. Also the magnet could be the factor that is causing the prop to start out differently, maybe it is stronger and doesn't allow the magnetic field by the motor to be broken by the prop pulling itself out in the reverse flow motion.