Conditioning JS and CSS load

I am apply the filters and code explained here: https://contactform7.com/loading-javascript-and-stylesheet-only-when-it-is-necessary/ to load the files just on pages which contain contact forms.

This is the code that i am using:

add_filter( 'wpcf7_load_js', '__return_false' );
add_filter( 'wpcf7_load_css', '__return_false' );

if ( function_exists( 'wpcf7_enqueue_scripts' ) ) {
	if ( is_page('descargas') || is_page('contactar') ) {
		wpcf7_enqueue_scripts();
	}
}
if ( function_exists( 'wpcf7_enqueue_styles' ) ) {
	if ( is_page('descargas') || is_page('contactar') ) {
		wpcf7_enqueue_styles();
	}
}

For this page: https://goo.gl/7Jdbzc

But like you see, this page doesn’t load CF7 CSS or JS, BUT form works fine, it is ok??

Thank you.