When posting to a page from the same site I get a 405 error

I have a site using SSL and redirecting to the SSL. Using a form on the site, when I fill out the form and post it to the site it gives me a 405 error. If I change the domain to one that sidesteps Cloudflare it works just fine. So it doesn’t seem to be a configuration issue with the web service. I have tried to add a page rule to bypass the cache, but that doesn’t seem to take care of the issue.

Keep the Cloudflare domain, but pause Cloudflare… so Cloudflare will merely resolve the domain to the origin. Wait for a couple of minutes and test again.

Does the form work?