@Peter Additional info:
I've tried to capture the network traffic, but I could not see why the above described issue occurs, but I've seen something wrong that is probably unrelated to the issue itself. There are some HTTP subscribe requests from my PC to the daphile/LMS:
Transmission Control Protocol, Src Port: 50780, Dst Port: 9000, Seq: 1, Ack: 1, Len: 302
Hypertext Transfer Protocol
SUBSCRIBE /plugins/UPnP/http://10.0.0.200:44603/plugins/UPnP/MediaRenderer/RenderingControl/eventsub?player=5a%3Ad4%3A11%3A14%3A90%3A14 HTTP/1.1\r\n
And the response is:
Transmission Control Protocol, Src Port: 9000, Dst Port: 50780, Seq: 34, Ack: 304, Len: 239
[2 Reassembled TCP Segments (272 bytes): #62(33), #63(239)]
Hypertext Transfer Protocol
HTTP/1.1 405 Method Not Allowed\r\n
The response makes sense since the request contains bad URL which has "/plugins/UPnP/" preceeding the "http://......"
Cheers