I already switched the security level to essentially off but I still see always a challenge page if I try to post something on my website. Unfortunately the challenge breaks the update or post action so that I can start posting again to be challenged again in an endless loop. This crashes completely my website. Thats a very big drawback of Cloudflare as I need to switch of the security level completely and its still not working.
Have you tried whitelisting your IP address?
If you’re on a paid plan, you can look at Cloudflare’s Firewall settings page to see which WAF rule is being triggered, then go to the WAF and turn off that rule. It’s not perfect, but it’s better than completely turning your security off.