Hi Yamamoto-san,
The concern with this use case is more related to impedance mis-match and loop antennas in your application. By adding the wire loop soldered to this pin, the motor current path now has some amount of parasitic capacitance / inductance that is causing ringing on this line.
We do not have a specific distance requirement, but would not advise adding blue wire modifications in-line with the motor current paths on our EVM.
The concern with this use case is more related to impedance mis-match and loop antennas in your application. By adding the wire loop soldered to this pin, the motor current path now has some amount of parasitic capacitance / inductance that is causing ringing on this line.
We do not have a specific distance requirement, but would not advise adding blue wire modifications in-line with the motor current paths on our EVM.