Some network IPs are no longer showing up in system logs, query logs, BUT still resolves?

[deHakkelaar]

Literally no ads being blocked

That Windows machine you are using wouldn't run a virus scanner like AVAST? AVAST offers a feature called RealSite that will inject additional DNS queries to a "trusted" DNS server (run by AVAST) in case something goes wrong with normal DNS resolution, see Hilfe: Windows löst Hostname auch ohne PiHole auf? - #26 by Chris80 (though German, it also contains a short solution description in English).