We’re so sorry to hear that you ran into trouble . We’d love to help
I was wondering if you have any antivirus or firewall enabled on your Windows PC? If so, could you please temporarily disable it and see if you experience connectivity issues?
Do you have any other remotes that you use to control Roon (on your Nucleus)? Do those work?
Do you have a little red triangle at the top of your screen that says Metadata Improver paused when you click on it? When I have that problem I get the same quick running through the tracks and then nothing. Happens on one endpoint but not another.
I think it is more a case of update, update who has the update? It was after the most recent Windows 10 update that things started going wonky.
Subsequently I updated the Sonicorbiter software in my Signature Rendu SE Optical and reinstalled the new Sunlight firmware on my Perfectwave Directstream DAC. Now everything works.
I have had situations in the past where after a Microsoft update my network devices stopped showing. I made it to level 3 Microsoft support with that one. I never knew Microsoft had level 3 support.