Slow updates - advice on query forwarding when using unbound

[P195]

Hi All,

I'm currently using Adguard home and unbound internal DNS as per this guide: https://windgate.net/setup-adguard-home-opnsense-adblocker/

I tried to run updates earlier which was being very slow and didn't seem to work, so I added a DNS under system > settings > general and ticked "Do not use the local DNS service as a nameserver for this system". Then when I tried to update it worked perfectly. I have now reverted those changes now that the firmware has been updated.

My question is, how should I set up OPNsense to update properly without having to change this setting each time I need to update, while still using the adguard > unbound > upstream DNS configuration detailed in the link?

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A follow on question is, what is the point / benefit in using unbound as well as adguard?

Thank You
P195