I have an asus router, that looks like it is answering some of the dns quires instead of google, which I have selected as the dns provider.
I am using a dynamic dns address to find my home network, so I had to give the router a wan dns server to communicate with the ddns provider. When I set the pi-Hole as my routers wan dns I had millions of quires in 30 minutes from a tivo on my network. So I set the wan dns to default and the dhcp dns to the pi-Hole. I don’t think this matters because when I don’t give the router a dns server the behavior is the same, but I thought I should mention it just in case.
Only have queries answered by cache,google,or blocklist
router.asus.com is answering dns quires even when I have added it to block list