Cloudflare DNS issue

that looks to be error specific to your web app not cloudflare ?

if using cloudflare did you ensure real visitor IPs are recorded properly ?

see

• How do I restore original visitor IP with Nginx?
• How do I restore original visitor IP with Apache 2.4?
• How do I restore original visitor IP with XenForo?
• Using Cloudflare with Xenforo forums

so follow the appropriate guide for your web server.

For my Centmin Mod Nginx users I wrote a specific guide for them including a script to auto generate the latest Cloudflare IPs for the configuration at Nginx Cloudflare & Incapsula (reverse proxy HttpRealIpModule) - CentminMod.com LEMP Nginx web stack for CentOS

If using Centmin Mod 123.09beta01 or newer branches, the generated Nginx vhost already have setup automated script to pull latest Cloudflare IPs for CSF Firewall whitelisting outlined here. The generated Nginx vhost will have an include file /usr/local/nginx/conf/cloudflare.conf that is prepopulated with Cloudflare IPs pulled in via a cronjob you manually setup as outlined here.

Code (Text):

  # uncomment cloudflare.conf include if using cloudflare for
  # server and/or vhost site
  include /usr/local/nginx/conf/cloudflare.conf;

cronjob you manually setup once only

Code (Text):

23 */36 * * * /usr/local/src/centminmod/tools/csfcf.sh auto >/dev/null 2>&1