Reverse DNS question for those using Adguardhome

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I have the ADGH plugin running on 53 and Unbound on 51515. OPNsense is the DHCP server. I've been running this setup for well over a year and for the most part it works great.

ADGH seems to get most hostnames from OPNsense just fine via rDNS, but I have a lot of localhost 127.0.0.1 entries that are clearly client requests. My upstream servers simply has 127.0.0.1:51515, pointing ADGH to the Unbound port for lookups, and then Unbound forwards any unknown queries up to my system DNS servers.

My theory is that this occurs because I haven't fully defined the upstream servers for reverse lookups properly. I use a few /24 ranges under the 192.168.0.0/16 range locally. I don't think I need any local entries that relate to my local DNS domain name, but maybe I need some .in-addr.arpa lines as well?