Node (device) can't get data from app server

I have built a web application with loraserver. Now, my app can get uplink data correctly both from app-server web UI and mqtt_sub commond, however,the downlink data sending to device(node) can’t be received correctly by device, but the downlink date frame could be seen at gateway frame logs.

I have searched related topics but still can not find a solution, any help will be appreciated, ths.

Does your device get the actual downlink? or your device gets the packet payload wrong?
What device/lora_module are you using?

Can you chek if it’s the same situation as my post?