This appears to be quite common with mconnect, mconnect tends to resample any source material to 16/44 using an inefficient method and if that source material is hi-res the mobile device running mconnect can run out of steam.
Doesn't happen on other UPnP clients such as BubbleUPnP so ditch mconnect.
Doesn't happen on other UPnP clients such as BubbleUPnP so ditch mconnect.