Thank you for the post @John_Gallup and sharing your feedback with us. Appreciated!
Moving forward, just to make sure I am understanding your report correctly. When the device hosting RoonServer is making use of an ethernet connection your remote devices function as expected but if the device hosting RoonServer makes use of a Wifi connection the remotes struggle to connect, yes?
Are you planning to switch over to Wifi on the Roon core and not make use of the ethernet connection? Can you provide me with the details of your setup using this link as guide? Having the details of your network configuration/topology and all the devices involved would be help as well.
-Eric