Freeze after 'Sent reset request'

I tried to run pnpbridge_bin and arduino using serial with IoTC. Arduino not response when SERIALPNP_PACKET_TYPE_RESET_REQUEST received.

What should I look for?

pnpbridge_bin:

<- 12:11:40 PUBLISH | IS_DUP: false | RETAIN: 0 | QOS: DELIVER_AT_LEAST_ONCE = 0x01 | TOPIC_NAME: $dps/registrations/res/200/?$rid=3 | PACKET_ID: 2 | PAYLOAD_LEN: 467
Info: Provisioning callback indicates success.  iothubUri=iotc-0289d4d3-9c48-461b-a803-3943e1e85247.azure-devices.net, deviceId=29bc3v3nkdz
-> 12:11:40 DISCONNECT
Info: DPS successfully registered.  Continuing on to creation of IoTHub device client handle.
Info: ***** Successfully created device device=<29bc3v3nkdz> via provisioning *****
Info: Connected to Azure IoT Hub
Info: Opening com port COM1
Info: Sent reset request

serial monitor:

Azure / iot-plug-and-play-bridge

Freeze after 'Sent reset request' #30