I'm long time Movi M15 user and for a some time I can't rent it to my client or to sell it because it acts very strange. Balance it perfectly, it works normal but from time to time it just turn of motors without any specific reason, even when standing completely still on the stand. There is no any pattern for this error. Sometime it work for hours without problem and sometime it stop motors often. Now it's on 5.02. I would like to test it with some older firmware if it's possible.