title: Express Checkout InContext - Paypal user address selector
body: <p>I may have missed it, but in <code>Sandbox</code> mode, it seems the user can't select from their <strong>existing</strong> Paypal (verified) addresses. </p>
  
  <p><img src="https://i.stack.imgur.com/37Gzg.png" alt="enter image description here"></p>
  
  <p>Is this just a bug in sandbox, or is this expected behavior (even in production)? That dropdown/select list is empty. Checking the sandbox account, each address provided is subsequently <em>added to the account</em> .</p>
  
  <p>If this (bug) is actually documented, or if I missed something in setup/code, I'll delete this question. Thanks!</p>
  
  <hr>
  
  <h2>Update:</h2>
  
  <p>In Sandbox, the issue is that:</p>
  
  <ol>
  <li>the user is first presented with the above UI (which asks for an address). </li>
  <li>After providing one, there will be a <code>change</code> link which behaves just like in Production where user can then choose from a list. </li>
  <li>The list <strong>isn't</strong> presented <em>initially</em> (forces user to add/provide) </li>
  </ol>