The issue was looking like an inability to pass the Captcha causing an endless loop. Further investigation revealed an issue caused by custom cache settings in the Cloudflare control panel.
How to disable ModSecurity on cPanel
If you are looking to whitelist a clients IP address, you are able to do so via the 'Firewall Manager' interface inside our client area. Client Area -> Firewall Manager How do I unblock an IP address? If your IP address is greylis...
TABLE OF CONTENTS IP Address Blacklisting Not listed User Greylist Global greylist Global blacklists Essential list For a number of years, we have used a combination of tools for security on our servers, including CSF, ModSecuri...