Non working /etc/hosts resolution via IPv6

[slubman]

Hello,
I have a strange issue with an AdguardHome installation.

I have some hostnames for my LAN defined in the /etc/hosts of the DNS server running AdGuardHome, and using a fictitious domain.
AdGuardHome is installed in a LXC container running Alpine Linux 3.19.1

Below is the network configuration:

If from another machine I query the DNS server over IPv4 I do get the IP for my hosts, but if I do the same query over IPv6 I get a negative answer.

If I do a query for an internet domain name, it works just fine over IPv4 and IPv6.

Example of internal resolution:

Example of internet resolution:

So how can I get the internal name resolution to work over IPv6 ?

[slubman]

Did another test by querying the AdGuard Home server on a link local address, and the query is correctly answered there:

So how do I make such query work with global addresses ?