Can any of you Bosch experts out there advise if the noise in the attached clip is normal or not? Bike is Cube eMTB and has done about 900 miles off-road since April. Noise only occurs when chain ring output shaft runs and not when main crankshaft totes in reverse i.e. In freewheel mode. There's no obvious play in any of the bearings or any signs of nasty seepage like you get from a failing headset or boot on bracket. Thanks in advance.
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