Roon on Nucleus Crashing Repeatedly

Thank you for directing my inquiry to the correct route. My setup includes a cable modem, and Apple Time Machine router hardwired to a netgear switch. This switch connects a Nucleus, a Lumin Streamer/dac, and a Bluesound Node 2i. The problem is that the core will lose connection, music stops and Roon has to re-establish connection. This takes a minute or two. I had a similar issue about a year ago with a KEF LS50W. I know longer have the LS50W. I now have a Bluesound Node 2i connected via Coax to the LS50W2 in one zone and a Lumin T1 streamer in another zone. The current setup has worked flawlessly for the past six months. Within the past 3 weeks or so this disconnect issue has been occurring with some regularity. Some days it will not disconnect at all. At other times it may disconnect 3 or 4 times a day. This happens when listening to both my main and bedroom system.