Uplink gateway-history is empty

OS:ubuntu16.04

software:
lora-app-server 2.6.0 amd64
lora-gateway-bridge 2.7.1 amd64
loraserver 2.7.0 amd64

I selected class C in the device-profile and the node also activated class C.

After the node join succeeds, I send a downstream message through the “/api/devices/{device_queue_item.dev_eui}/queue” in the api console, but the lora-app-server always prompts the error “uplink gateway-history is empty”.

The node must send an upstream message before receiving the downstream message I just sent.

No configuration changed today, the test passed.