admin-ajax.php still called every 15 seconds

Hello. Thanks for creating this plugin. After installing it when I’m editing a post, I still see admin-ajax.php being called every 15 seconds with this data:

{
“wp-refresh-post-lock”: {
“new_lock”: “1495561144:1”
},
“wp-auth-check”: true,
“server_time”: 1495561144
}

Does this mean the plugin isn’t working?

Thanks!