Since upgrading pihole, I found there are periodically websites being blocked, but the dns lookup is not logged by pihole as either being blocked or forwarded. The latest one I whilelisted was:
Prior to white listing, I would click on the link to view my order from the portrait studio and my web-browser would display an ip address not found. After whitelisting, the link works normally.
But here is the thing, when I search the lookup logs, I don't see the domain as being queried at all.
My guess is this has something to do with 5.0's handling of CNAME records, and it is being logged as a different domain name. But that is strictly a guess on my part.
Is there a way to turn off the CNAME filtering? Then I could quickly learn if this is the issue.