acme-mailcow finds wrong ipv6 address

Hi,
I am installing mailcow and it signed the certificates itself.
It looks like mailcow can’t find the correct ipv6 address.

It gives this error:

Cannot match your IP 0000:0000:0000:0000:0000:0000:0000:0000 against hostname <mail.example.click> (DNS returned <correctip>:0000:0000:0000:0001)

How can I fix this?

@niwla23 Could you solve this issue?

Check this for Hetzner (and probably others):
https://docs.mailcow.email/getstarted/prerequisite-system/#mtu
Seems sometimes the wrong adapter is used.