SENSORLESS problem for Firmware v0.5.1

Firmware v0.5.1:

The motor does work fine when setting odrv0.axis0.requested_state = AXIS_STATE_SENSORLESS_CONTROL

But,I can not send any command to odrive.

and I need to turn off power to stop motor.
I try again and sent dump_errors(odrv0)

Do you have any idea of experience similar to this situation?

That’s quite strange. I will make a note of it, thanks.