Intermittent 520 error issues.

After having many micro 520 error issues, I’ve talked to my server provider, IONOS, and they confirmed that the server is working properly.

To have a confirmation, they asked me to pause Cloudflare, return the original IONOS DNS addresses, and check if the site is running fine.

That’s what I’ve done, and now everything looks ok.

Is Cloudflare having any issue?

What can be the cause of this problem, since IONOS says that everything is alright on their side?

Thank you very much for your answer.

Xavi {redacted}.

I am also experiencing this issue. I use IONOS as well. Sometimes the website works fine, and sometimes I get the error.

Have you had any luck resolving this problem? I’m not sure what to do.