Today as I was reviewing the different logs under Settings / System / Logs / DNS (dropdown) I was seeing a large number of log entries for the disabled WLAN of the RPi 4. The log entries are all similar to this:
[INFO] 172.30.32.1:57221 - 45501 "A IN wlan0.local.hass.io. udp 37 false 512" NXDOMAIN qr,aa,rd 37 0.000300146s
I did find a Github issue that describes this exact behavior, and that Github issue was created back in May of 2023, so this occurring is not new. I’m currently on OS 15.0 and Core 2025.3.4
https://github.com/home-assistant/plugin-dns/issues/110
That issue was closed without any comment or action other than others also having encountered the same thing like I have too.
I did not notice any performance issues related to those entries. So they seem benign and innocuous. And a system reboot seems to have resolved them, for now at least. The HA system was last rebooted about two weeks ago.
But I decided to make a post here for anyone in the future searching the community about those messages they may see in DNS log for a disabled WLAN adapter.