Sometimes first connection to Cloudflare proxied site will fail

Hi,

My site is proxied in Cloudflare. Sometimes, I notice that the first connection to my site may fail. For example, when using AppVisor at publisher.appvisor.com to validate my PAD file and check the URLs of my site, such as https://www.datanumen.com, I will get the following error:

“We have received an unexpected result while parsing the contents of the file located at this URL. We have the data type [unknown], while it should be data type [text/html].”

If try again, then the error will disappear.

Why and how to fix this issue?

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