I managed to create a domain ("XXX.local"), where all my machines are registered, with AVAHI configuration. I'm able to see all of them with avahi-browse, no issue there.

None is listed with "client -domain "XXX.local".
(I compiled the "examples/resolv/client.go" as "client")

Adding some traces in the code, and trying to see where/how this can be fixed.
Possibly, a proposal for a fix can come before end of this week.