tuning PID speed for the skateboard motor with hall sensors

I am having a hard time calibrating the pid speed for a skateboard motor that has hall sensors

above 1000 rmp it seems quite stable but below 1000 at low rpm the engine shakes and I see the dudy clycle "vibrate" oscillate, lowering the values ​​does not improve

I suspect that the problem is the hall sensor that at low rpm has little resolution, is it possible?