I just replaced my router from a netgear AC1900 R7000 to a TP link TL-R605. I expected ads to be blocked and DNS to be resolved.
Actual Behaviour:
I set the LAN DNS to the proper local IP of the pi (192.168.1.71) as it was before, but no ads are blocked. I then set the WAN DNS to the same, and everything cannot be resolved on clients.
is the DHCP server still active on your new router? just a htought. i can't access your debug token obviously.
comeone will be along with more knowledge and info than me i'm sure.
I think that I solved it. This new router required me to set an upstream DNS on the PiHole to the IP of the router 192.168.1.1. Seems to be working well now.