Kinsta is my webhost If you are on Kinsta, you need to contact Kinsta support and let them know that you want to whitelist the following QUERY ARGS & COOKIES to prevent caching. COOKIES utm_campaign utm_source utm_term utm_medium utm_content gclid first_utm_campaign first_utm_source first_utm_term first_utm_medium first_utm_content handl_original_ref handl_landing_page handl_ip handl_ref handl_url organic_source gaclientid HandLtestDomainName //and all the custom parameters created by you QUERY ARGS utm_campaign utm_source utm_term utm_medium utm_content gclid //and all the custom queries you are capturing Usually, this process takes couple of hours to complete. Hoever, you may want to wait longer for changes to completely take effect. Still having problems? Let us know, clicking the chat bubble at the bottom right of the page. Customer Provided Feedback "I have found that the guide you have about Kinsta and the custom cache rules where we need to ask Kinsta to implement specific rules to let Handl work, are not enough. I'm sharing with you a screenshot from the Kinsta dashboard which shows that Kinsta Edge Caching (saving HTML on Cloudflare Edge PoPs) is not compatible with custom cache rules, and thus Handl customers with Kinsta should also turn off Edge Caching. It's logical since Handl rewrites HTML based on query parameters and custom cookies and the HTML in Cloudflare edge are static and not even triggering the HandL plugin." This feedback was provided by a customer and included in our documentation as is.