Thanks for your help Brian.
Not sure what else either of us can do.
I have the station set to Public (always has been), but not sharing with WU (Was going to do that through WD).
I am getting data reliably from the WeatherFlow hub via UDP and Node-RED, so feel confident that the router is working as it should.
(I have about 80 devices on my network, so am very comfortable with Windows, Linux and IoT devices).
I find it odd that cronweatherflow finds the station devices and all the sensor names, but not the data?
The debug from the control panel in WD does not show any errors.
Let me know if there is any other debug information I can get.