I appreciate this isn't massively helpful - but it's maybe worth restating that Meridian have always been clear that their Sooloos devices should be networked only via ethernet. They don't recommend and have never supported networking via wifi or powerline adapters. I used to have repeated random and extremely frustrating issues with MS200s, MC200s and an ID41 card when I tried to avoid having to ethernet cable the house. I ultimately gave in and wired those rooms I wanted Meridian endpoints in. I've had no issues since then.

I greatly doubt this is a Roon problem. It's another example of the instability of Meridian MDMS/Sooloos devices over wifi/powerline adapters. I hope you manage to find a solution but it's likely, even if you do, that the issue will recur from time to time.

Ian

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861v8+ID41, 8000.2, various other M processors, DSPs and MDMS zones