You literally wrote a paragraph criticizing my hypothetical example domain name choice
It was not evident that your provided domain test.domain.local would by hypothetical. Internet standards tell you to use example.com or a subdomain of it (like test.example.com) for hypothetical example domain name. And your given example was evidently using a non-domain name of mDNS instead. As a non-native speaker, I was unable to read your mind nor your assumptions. The Internet standards are explicit. And the community guidelines remind you that we're a global community and hence your undisclosed assumptions were leading to confusion.
I did not criticize your domain name. I tried to indicate that some unexpected symptoms may be caused by continuing to use internal domain names compliant with Microsoft recommendations of 15 years ago but no longer compliant with Microsoft recommendations of 14 years ago. So such risks are not hypothetical but happen in real networks of Spiceheads. And before your clarification, there was no indication that your network might NOT encounter such risks.
and did nothing to answer the question I had.
In my experience, there have been Spiceheads who has symptoms similar to your caused by mix of DNS and mDNS as they had set up their environment when Microsoft was using the reserved domain namespace local for internal DNS. Their later upgrades did not become aware of change of mind of Microsoft. Due to the domain name specified by you and quoted by me, it was evident that your symptom may interfere with what I answered. Glad for your clarification and that you could ensure that no such interference was taking place in your situation.
- Did you really think my actual domain name was test.local?
No, I did not think that test.local was your actual domain name. I understood that test.domain.local was the actual domain name, probably not of production system but a test lab for reproducing your symptom and proposed fixes. The quoting function of the Spiceworks community platform is helpful in this regard to avoid such risks of wrong reference or mutation errors in quoting. Nowhere did you indicate that the provided name was hypothetical and you selected not to use the standard namespace for hypothetical domain names, as written above. The referenced and linked Internet standard is compliant with these Internet standards and uses several hypothetical domain names of this default namespace.