dns resolution - general settings

[keropiko]

hi all,
i have opnsense 19.7.7 setup with multiwan configuration. i am using unbound as internal resolver that forwards to a private dns server and in system->settings->general i have setup a DNS server per gateway, all working good.

Lately i noticed a strange thing. When i reboot the firewall, if i go to interfaces->diagnostics->dns lookup, and try to resolve an address, the firewall only checks through 127.0.0.1 dns server (it does not check through all the dns servers, i have setup per gateway, as it used to do in the past).
I found this problem because in the past, when the dns server i forward through unbound (private one
) did not work, the firewall was resolving through the other servers (at least for services like dyndns update ecc.), but now, some days ago that the dns i forward from unbound did not respond, i had no dns resolution.

If i go to settings->general and click save again, then it does resolve through all the dns servers.

Thank you