unbound "domain override" stop working at random intervals

[plamen]

OPNSense acts as main internal DNS server (.lan) and I have a windows AD domain controller (.dom.lan)
Ubound dns is configures with domain override for *.dom.lan.

On boot everything works but after some time, usually less then 24h, unbound stops responding to requests in *.dom.lan zone. This prevents windows clients to find their domain controller.

Restarting unbound resolves the issue. I've tried putting the override in "Overrides" or in "Query Forwarding" even tried having it i both at the same time.

So far there is no useful information in the logs. They just show that at some point unbound stops redirecting request to the domain controller dns server.

This was working with no problems in 21.x