Since CNAME inspection blocking was introducted a long time ago, I would have dozens of domains "blocked during CNAME inspection" every day. By simply grepping the logs for "cname inspection" I had many results.
grep -i "cname inspection" pihole.log
Since updating Pihole last week to the newest version, it appears that message now only appears for 1 domain (gstaticadssl.l.google.com). It would previously be dozens of domains each day.
Is CNAME blocking borked since the last update ? Or did the message/log format just change ?
For us to be able reproduce it, it would help if you could share at least some of the domains that are missing now where you were seeing CNAME blocks in your previous logs.