Does not change the price when update commerce 7.x-1.11

The Commerce module version 7.x-1.11 contains a fix Remove the default product entity from the form state just prior to caching → . A side effect of this update is, that the price on the Add to cart page is no longer updating, when changes are made in the form on that page.

The problematic bit of code introduced by that change:

 * After build callback for Add to Cart forms
*/
function commerce_cart_add_to_cart_form_after_build(&$form, &$form_state) {
  // Remove the default_product entity to mitigate cache_form bloat and performance issues.
  if (isset($form_state['default_product'])) {
    $form_state['default_product_id'] = $form_state['default_product']->product_id;
    unset($form_state['default_product']);
  }
  return $form;
}

...is in conflict with the submit function of the Commerce Pricing Attributes module:

function commerce_pricing_attributes_add_to_cart_submit($form, $form_state){
  if (isset($form_state['default_product'])) {
    $current_product = $form_state['default_product'];
  }
  elseif (isset($form_state['products'])) {
    $current_product = reset($form_state['products']);
  }
  else {
    return;
  }
 .............
}

So changing a value, or clicking the add to card button does not change the product price.