It's not something funny to do with DPM, is it? I am vague because I haven't run 8.x firmware but I recall someone else had problems with discovery when DPM was enabled, which I think it might be by default.
ETA: but that wouldn't be consistent with not working "for a long time..."
ETA: but that wouldn't be consistent with not working "for a long time..."
Roon (Mac Mini), Wilson Benesch Full Circle, Expert 1000 Pro CI, Kaiser Chiara
Warwickshire, UK