Stokemonkey hub motor current draw at rest

Hi everyone,

Im looking for a little advice please.

I have a stokemonkey cargo bike motor kit, which recently got water damage into the controller. So I decided to rebuild the controller and the display using a FLIPSKY FSESC controller . Admittedly this is a bit of an overkill, but it should work just fine and I was interested in learning more about motor controllers through this project.

Anyhow I can set up the motor (FOC sensored)  and the ADC controller just fine (set to duty cycle), and the motor rotates nicely when I pull the throttle and is well mapped across the throttle voltage range.
However at rest (0.8v from the ADC), there is a disconcerting noise from the motor. It sounds like a faint cracking like an electric fire. When I look at the real time data, there is -0.3 to 0.1 amps being recorded as current to the motor. This fluctuates in time to the sound.

Here is a little video, the sound is most noticeable after I cycle the motor.

https://photos.app.goo.gl/ZFkh3wdJeWQBsoT18

Any suggestions? is this ok? can I ignore it? or can you suggest a solution.

Im happy to provide more details if needed.

Thanks in advance