Workaround to update prices at checkout (currently not working)

forcePricetableUpdate.js

(function(){
  var currentPostalCode = "";
  
  $(window).on('orderFormUpdated.vtex', function(ev, orderForm) {
    
    if(orderForm && orderForm.shippingData && orderForm.shippingData.address && currentPostalCode != orderForm.shippingData.address.postalCode){
      currentPostalCode = orderForm.shippingData.address.postalCode;
      
      var params = ({'postalCode':{'value':currentPostalCode}});
      
      $.ajax({
        type: 'POST',
        contentType: 'application/json',
        dataType: 'json',
        url: '/api/sessions/',
        data: JSON.stringify({
          public: params
        })
      })
      .done(function(){
        $(window).trigger('vtex.custom.updateCart');
      });
    }
  });

  $(window).on('vtex.custom.updateCart', function() {
    
    if(vtexjs.checkout && vtexjs.checkout.orderForm && vtexjs.checkout.orderForm.items && vtexjs.checkout.orderForm.items.length > 0){

      var item = {
        id: vtexjs.checkout.orderForm.items[0].id,
        quantity: vtexjs.checkout.orderForm.items[0].quantity,
        seller: vtexjs.checkout.orderForm.items[0].seller
      };
      
      var itemToRemove = {
        "index": 0,
        "quantity": vtexjs.checkout.orderForm.items[0].quantity,
      };

      vtexjs.checkout.removeItems([itemToRemove]).done(function(){
	vtexjs.checkout.addToCart([item], null);
      });
    }
  });
})();