POST:admin-ajax.php request taking seconds to load

Our website has a request which takes is over half the website load time. The POST area of gtmetrix says “action=porto_refresh_cart_fragment” but we have no cart so it’s pointless & also a 400 bad request.

I have tried the following to disable this code:

heartbeat control plugin
speed drain repair plugin
disable cart fragments

Adding custom code to the functions.php to dequeue.

The only way i can get rid of it is to allow fastest cache plugin to render block the website. That gets rid of it but we then have 3 render blocking js & css.

Any help? Nobody else seems to of had this specific issue.

Read more here:: POST:admin-ajax.php request taking seconds to load

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