I would like to clarify this "/components/com_easysocial/polling.php" request is totally different than what you see the poll story form in Easysocial.

In order to let user retrieve immediately system notification on the site, Easysocial will send a polling.php request to your server for retrieve the current latest data and see whether this current logged in user got any newest notification.

By default, it will request this polling.php every 2~3 second, but you can adjust this from your site backend > Easysocial > Setting > general > notifications > Polling Interval (if you do not have user retrieve those system notification quickly, you can set to 999999)

And turn off this setting from backend > Easysocial > setting > general > conversations > Display Typing State

Then manage again and see how it goes.