False Positive "Unsupported system - DNS server issues" alert

Configuration
1

I've been running HAOS inside a proxmox VM for a few years now, and just yesterday I got this notification:

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I have two bind9 DNS servers at home. Both are working perfectly fine. I entered HAOS shell and did some nslookups against both of my DNS servers and both are responding as expected on both IPv4 and IPv6.

Yes, I did disable 'fallback' DNS ages ago, that's intentional.

Any idea why am I suddenly getting these messages?

2

Are you running PiHole, AdGuard, or another DNS-redirector package?
"Smells" like a DNS problem to me.

3

bind9. My dns works perfectly fine, I have no idea what home assistant is complaining about

4

Is it recursive resolving?