title: WooCommerce dropdown issue after update
body: <p>I have just updated to Woo Commerce 3.2.0 and my variations all worked fine before the update, now they’ve suddenly stopped working. They all show up on the Products page but when the Add To Cart button is clicked I get a message to say “Please choose product option”. Add to cart button is inactive as well.</p>
  
  <p>Has anyone faced this? I wonder how to fix it. </p>
  
  <p>P.S.: rollback to WC 2.6.1 reveal dropdonws on product page but all products missed. So, thus is not a way out.</p>