DNS fails

Hi All,

I’ve a separate dns server (unbound) in the lan, which is failing after os (arch linux) upgrade.
On workaround helps: If I reassign the servers’s ip under IP > DNS after assign it to for example
to google.
I’m not sure if it is Mikrotik / Arch related.

Do sou have any idea what is causing this behavior?

Mikrotik v6.43.4

Thanks in advance!