Roon can't find devialet

[KraaijCheck]

I've had my Expert Pro Roon Ready connection completely disappear from Roon and I've had it simply stop working.  But in both cases, Roon AIR still worked as did other inputs on my Expert Pro.  In both cases, only a full power cycle of my Expert Pro resolved the problem.  Power cycling Roon or any network gear made no difference.  Now, this occurs very infrequently for me and not reproducable.  Still, it leads me to believe that the Devialet firmware/OS update this past fall makes RAAT somewhat less stable. 

@KraaijCheck - not sure if you're having the same issue but you didn't mention power-cycling your 220 Pro.

Thanks for your answer. Yes i did several power-cyclings on my D220. I even did a factory reset en installed the latest firmware again. Nothing seems to help. Roon Air is also not 100% stable. With Air it can stop playing and will say "device in use".