Kodi server on android not available for remote access

I have set up two Kodi servers Krypton. One on Windows. One on Android. I have configured both the same settings in services. That is, enabled zeroconf, http access and so on.

The server running on windows appears fine with Kore.
The server running on the android device is not discovered. It remains the same as Ben with manual config of the IP address and ports etc.

I have done multiple reboots of devices and tried a few other remotes just in case.

There is no WINS server on my network.

A ‘Fing’ scan however does show the service is publishing! It is very confusing.

Does anyone have this strange experience and a solution?