Slow Cloudflare Proxy

I am upgrading from CentOS 6 to CentOS 8 (by creating a new machine so I can fallback as needed) and have run into a weird problem and hope this rings a bell for someone.

When using Cloudflare Proxies, the webserver for lifeboat.com is very slow and often doesn’t work at all. BUT all the other domains such as spanish.lifeboat.com and russian dot lifeboat dot com work fine. If I remove proxy service from lifeboat dot com, then that domain works fine. Note that I had to go through the pain of getting a certificate from elsewhere to make my domains work without Cloudflare’s Proxy service.

Ideas?

Did you solve the problem?
I’m facing the same…