Boost not being served when ajax request is triggered on document ready

Apparently, calling a certain behavior function via JS when the page has loaded causes Boost to fail (i.e I'm not being served the boost files.). In this scenario I'm using Drupal Commerce Ajax Cart to trigger a cart refresh when the page has loaded (this is a commerce site, so refreshing certain parts with ajax is needed to get things working along with Boost).

I'm calling this function on $(document).ready():

Drupal.behaviors.commerce_add_to_cart_show_ajax_cart.fillCartBlock();

The function above looks like this:

$.post(Drupal.settings.commerce_ajax_cart.update_url_block,function(data) {
  jQuery('a.commerce-ajax-cart-loader').html(data);
}) ;

If I remove the call on document.ready, Boost works and I'm being served the static, cached HTML pages. However, if this call exists, I'm never served the HTML page (they are being created though). I'm struggling to wrap my head around why, since Boost shouldn't really be aware that I'm even calling that function since it happens after the pages has loaded.

Any ideas on how to solve this?