Zones disappearing intermittently

[Carl]

An update from the OP … which I know will be appreciated by @support.

An apology is in order

I feel an apology is in order to Roon support. Since I complain about things not working properly, I feel it is appropriate to publicly acknowledge that neither Roon, nor its updates were responsible for zones intermittently disappearing. I suspected that the problem was somehow related to a firewall blockage, even though Roon was shown to be an exemption. I deleted Norton, and failed to reinstall with various error messages. After escalating matters to tier 2 support with Norton, Their softwa…