Thanks for the details. I would like to narrow down the pattern a bit more.
Please let us know the exact local date and time the issue next occurs. If there is a pattern, please include that as well, especially whether it happens when disabling or enabling a VPN, or when switching between Ethernet and Wi-Fi.
The devices kept dropping out especially when grouped. Sometimes just for a few seconds and and other times for hours. At this point I was using WiFi both on PC and audio devices. Now I’m on Ethernet (PC and Node). Not immediately but pretty soon it got better.