I worked on a site that had this issue recently and I was a real PITA. Great to see @sitebulb.com giving us an easy way to find them 😊
Third time I have encountered a site that caches requests to 404 pages, then on the next request to the same URL returns a 200 and serves the cached error page 😂 @sitebulb.com being cool and adding in a double-404-check thing to catch these!
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