Problem cache on wordpress 4.2.1

Hi,

great plugin, but after upgrading to WordPress 4.2.1, when I go on to analyze PageSpeed Insights in the images it remains to optimize the cache, first with wordpress 4.1 did not happen, I tried to reset cache, minify etc .., disable the plugin, delete, reinstall, nothing remains the problem, what can be, because the plugin seems to work equally

http://lechiccherie.com

Thanks

https://wordpress.org/plugins/wp-fastest-cache/