I do not understand how I could have any queries answered by dns.google. I have all queries forwarded to 127.0.0.1#5053 to be answered by DoH via cloudflared (hence the localhost entries). I have not seen this on the V4 install I have.
root@DietPi:~# cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.7.25
Or the volume is very low and you are seeing something from the debugger since that queries 8.8.8.8. Have you run the debugger more than just this one time for the token?
Might look at changing that to use the selected upstream instead of 8.8.8.8?
*** [ DIAGNOSING ]: Name resolution (IPv4) using a random blocked domain and a known ad-serving domain
[ā] secure-drm.imrworldwide.com is 192.168.7.27 via localhost (127.0.0.1)
[ā] secure-drm.imrworldwide.com is 192.168.7.27 via Pi-hole (192.168.7.27)
[ā] doubleclick.com is 216.58.198.174 via a remote, public DNS server (8.8.8.8)
You saw the remnants of the prior 24 hours. After you make a change to a new resolver, it takes 24 hours for the dashboard history to scroll off the left and exit the dashboard display. Any google.dns queries made will appear in the dashboard for 24 hours after they were made.