The http cache caches the complete html response, when the http-cache is active you can only use ESI-tags or javascript to change the html output. This is not a shopware issue, but the functionality of the caching itself.
The http cache caches the complete html response, when the http-cache is active you can only use ESI-tags or javascript to change the html output. This is not a shopware issue, but the functionality of the caching itself.