Many thanks for the range of responses. Life has interrupted further diagnostics. Another HH has kindly reached out via PM to assist me with the network diagnostics. I feel it is worthwhile trying to make it work without having to lift carpets, floor boards and chase cables through walls and then have them repaired and redecorated. That for me work be a costly last resort. I not blaming OEM at this point and I am just objectively trying to solve the issue/change in settings/change in hardware or state of operation in hardware along the way.

Last edited by Ado; 2019-12-08 12:18.
Z0: 861v8+ID41+Roon on a QNAP, Naim NAP300, Sonus Faber Amati Anniversario

Z1: Arcam AVR-450, Oppo BDP-103D, SkyQ, Apple TV, Kuro KRP-600A, Sonus Faber Guarneri Memento & Cremona Center M speakers, Martin Logan Descent-i Sub, 2 B&W wall speakers

Z2-6: Roon controlling MC600 Zones into Parasound amps to B&W ceiling speakers