I am having problems with the Turnigy TGY-50090M servo. So far I have fried two of them. First, the steering mechanism is smooth and does not bind so it is not being stressed when in use. When returning to center, it would buzz and if I flicked the steering on the controller it would stop buzzing. After a minute it would start moving on it’s own and eventually lock up. It is not the reciever as I just upgraded it to a Spektrum transmitter and receiver, one also did the same thing with a cheap Flysky setup. The motor and ESC is the motor is the recommended TrackStar ROAR approved 1/10th Stock Class Brushless ESC and Motor Combo (21.5T). I am at a loss on this one. Is there any higher quality servos others use?