Hi there, @juanantonio,
When using WP Super Cache with features like marking favorites that rely on cookies, you’ll need to ensure this dynamic content is excluded from being cached.
One approach could be to use the WP Super Cache’s advanced settings to exclude pages that contain the favorites from being cached when the specific cookie is set. Check for options to exclude pages based on cookies or dynamic content within the plugin settings.
You may also need to implement some AJAX functionality that loads the favorites information dynamically on each page load, rather than relying on the server-side page cache.
Could you please post your site URL here so that we can have a look? If you want it to remain private, you can also contact us via contact form. If you choose to reach out directly, please include a link to this thread.
Thank you!