Naim App no longer picking up Minim server

[simoncn]

This kind of instability suggests a problem with your network that is affecting UPnP multicast discovery. These problems can be very difficult to diagnose and they usually don't affect normal network use such as web browsing, downloading, etc.

If you can describe your network setup in detail (all devices and how they are connected to each other via your router, switches, etc.), this might provide some clues as to what might be causing the problem and ideas for what to try next.