Hey @davidh, I split our conversation into a new thread since it sounds this sounds like a different issue.
It seems like you’ve been experiencing trouble with your Zen Mini for quite some time:
The symptoms you’ve been describing since September are typical of a device that doesn’t meet our minimum requirements and isn’t officially supported.
I’m afraid there’s not much else we can suggest other than using your iMac as a core instead. You can still use the Innuos as an endpoint, but you’re going to continue running into problems if you use it as a Roon Core.