With WP Rocket, it's recommended to activate the Preload feature.
Note: If you wish to use the "Generate Critical CSS Paths" feature in WPRocket, you will need to contact Strattic support so we can whitelist the necessary WPRocket IP addresses.
Eliminate Render-Blocking Resources
Enabling these settings will help with performance metric in Lighthouse that says “Eliminate render-blocking resources.” This refers to files that are set to load before the content on the page can load.
If you make significant changes to the website and publish the page or do a full site publish the CSS elements may not publish properly.
This issue is easily solved by clearing the WP Rocket cache before each publish.