Hi We are experiencing weird noises with our RMD-X8 Pro 1:9. The noise only starts after running the motor for ca 30-60 seconds. Please see the following video for reference: In the video a sinusoidal torque reference is applied to the motor. The clattering starts after ca. 40seconds and then just gets worse. If the motor is rebooted (by cutting the power) the noise first stops and then comes back after ca 30 seconds. Does anybody know what this is and how it can be removed?