Stuck on 'Preparing your TV'

Can someone pls assist with this:
The client app on Apple TV and iOS just sits there on 'Preparing your TV'
Somehow by stopping and starting I get it to load, it does not play any dvr content, just direct channels via the HDHomeRun.

I have submitted the logs below. There are some Warnings re buffer full as well
Thanks
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They are going to want logs from the client so you might want to submit those as well.

Thank you have just done that.

And... in doing that, I realised this:

The Apple TV client was connecting to the macmini (DVR)'s wifi despite it having an ethernet interface. When I tried to force the Apple TV client to connect via the DVR's ethernet IP, it says IP not available.

If I disable wifi on the macmini, then the client automatically connects via ethernet and the issues that I was experiencing dont occur.

Why it wasn't working as well via wifi is a separate issue and am not fussed about that.
Why it won't connect via the DVR's ethernet interface is the question. Taking into account that other mobile clients connect without issue, so its only the Apple TV that wouldn't.

Already tried: restarting the Apple TV, the network and reinstalling the app etc.

Apple's Bonjour implementation figures out the IP and gives it to us. Not sure why it's picking WiFi in this case.

Perhaps internet sharing is enabled on the Mac mini?