If the device receiving the uplink is set up to not send any acknowledgement, it might be normal, but I am not sure. Did you check this topic and this one ?
Do you have the same behavior when using the TTN console (as a test) ?
If the device receiving the uplink is set up to not send any acknowledgement, it might be normal, but I am not sure. Did you check this topic and this one ?
Do you have the same behavior when using the TTN console (as a test) ?