title: Wordpress - woocommerce - adding to cart, cart item quantity not updating
body: <p>I am changing the input_value for the product quantity input with woocommerce_quantity_input().</p>
  <p>It dose what I want, but only if I do a hard reloade of the browser.</p>
  <p>If I just add the product to the cart and reloade the cart the quantity wont update.</p>
  <p>Maybe its cached, and if so. Can I clear it? Or can I simulate a hard reset?</p>
  <pre><code>$product_quantity = woocommerce_quantity_input( array(
      'input_name'   =&gt; &quot;cart[{$cart_item_key}][qty]&quot;,
      'input_value'  =&gt; $sInputValue,
      'max_value'    =&gt; $aProductMaxData[0]-&gt;product_max_cap,
      'product_name' =&gt; $_product-&gt;get_name(),
  ), $_product, false );
  </code></pre>
  <p>This is the hook I'm using</p>
  <pre><code>woocommerce_cart_item_quantity
  </code></pre>