520 Error 50/50?

I'm having an interesting issue after my plan changed from Pro to Basic and now back to Pro where it's basically a 50/50 to connect to the site from the domain, but loading from the ip without cloudflare works just fine, it's 520 or 200, anybody got any ideas? url if you wanna see for yourself: https://tg11.org/api/color.php?color=red i hope this is the right place to post 😅