It may be that the gateway fails to forward the downlink command, or the node fails to receive the downlink command. You can check the problem of the gateway forwarding the downlink command.
The gateway may fail to forward the downlink command, or the node may fail to receive the downlink command. You can check the problem that the gateway forwards the downlink command.
Either the gateway failed to forward the downlink command or the node failed to receive the downlink command. You can check the problem that the gateway forwards the downlink command.