I have tried multiple times to work with the Cloudflare tech support but they keep assigning my question as solved even though I am still having the issue.
I’m on a dedicated server with dreamhost, so all 20+ wordpress websites have the following issue:
When in the backend and trying to go to the edit post page, e.g.: /wp-admin/post.php?post=28692&action=edit many of the .js files are returning as 503, not all js files, see chrome inspect element screenshot here: https://ibb.co/28mjf8g
When loading each individual .js file from my browser they load just fine. Now after hitting refresh many times eventually these .js files begin load fine.
When I “pause” cloudflare completely I don’t get any 503 errors, so I decided to use page rules to bypass cache and disable security and performance for the backend /wp-includes & /wp-admin but that didn’t work.
I have removed all plugins still issue persists if cloudflare is on.
I’m not sure what else I can do any help is appreciated.