Hi @Alan_Meldrum,
I got the analysis back from the logs and it appears you were playing to “System Output” at the 20:15 timestamp you noted, not to your Linn zone.
Since this issue occurred on “System Output”, that further suggests that the network is implicated here.
I realize that other apps work as expected, but they don’t use the Core + Endpoint architecture that Roon does, and for Roon to work properly, a solid network is a must.
I would suggest looking into getting a consumer-grade router to replace the Virgin Media router you currently have as that would very likely improve overall stability of your setup. You can read over some recommendations in the following thread: