I can confirm I have the same issue.

Extending flaps on the ground will cause the flaps to move up and down indefinitely as evidenced by the flap lever noise and the flap actuator annunciators near the flap indicator.

Interestingly, this seems to only happen when the aircraft is travelling at taxi speeds on the ground. When the aircraft is stopped or is travelling at a high speed (i.e. takeoff roll or landing roll) this problem goes away.