Can't bind IPv6 on OpenBSD #8621

Prerequisites

• I have checked the Wiki and Discussions and found no answer

• I have searched other issues and found no duplicates

• I want to report a bug and not ask a question or ask for help

• I have set up AdGuard Home correctly and configured clients to use it. (Use the Discussions for help with installing and configuring clients.)

Platform (OS and CPU architecture)

OpenBSD, AMD64 (aka x86_64)

Installation

GitHub releases or script from README

Setup

On one machine

AdGuard Home version

0.107.79

Action

After installing AdGuard Home it tells me the IP I can use to get to the UI including IPv6, but it works only using IPv4 address.
Using netstat -na | grep LISTEN | grep 3000

I can only see listening on IPv4

tcp 0 0 *.3000 . LISTEN

Same for port 53

netstat -na | grep LISTEN | grep 53
tcp 0 0 *.53 . LISTEN

Changing listening IP to '::' in the .yaml does nothing.

Expected result

It should listen to both IPv4 and IPv6 as it does on other platforms.

Actual result

It listens only on IPv4.

Additional information and/or screenshots

I asked Claude because I have some technical knowledge limits, and it seems that OpenBSD in newer versions doesn't allow applications to open a single socket that listens to both IPv4 and IPv6, they must open two sockets.