I have upgrated my OS (now Sierra 10.13 from 10.12.6). Now my Devialet appears in ROON as before.
Formerly Devialet 220PRO CI, Magico A3, 2 Gold Phantoms, Dialog/Raspberry PI2 Digi+, ROON Rock NUC8i3, Bluesound Powernode 2i, B&W 607, Audirvana