Views not counted with Comet Cache enabled

Hi,

I have
– Counting mode: PHP
and a code in my child theme functions.php file

/* Posts View Counter*/
add_action( 'wp_footer', 'wpr_reload_ajax', PHP_INT_MAX );
function wpr_reload_ajax()
{
?><script>
var request = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
request.open( 'GET', window.location+'?<?php echo time(); ?>=1', true );
request.send();
</script><?php
}

everything works fine with my plugin WP Fastest Cache Cache, even before the Cache plugin Zencache.
code I found there
http://blog.wp-rocket.me/fr/compatible-plugin-compteur-vues/