title: ACF IMG returns ID not URL when in archive.php
body: <p>I have a WordPress site and have a simple div with a background image in <code>footer.php</code> being called from ACF options field like so:</p>
  <pre><code>&lt;div id=&quot;footer&quot; style=&quot;background-image: url('&lt;?php the_field('footer_background', 'options'); ?&gt;');&quot;&gt;
  </code></pre>
  <p>This works perfectly on all my pages and templates. However, when going into a blog category (from the categories widget in the blog page) which is calling <code>archive.php</code> it converts the URL to the image ID and outputs <code>'85'</code> rather than the URL.</p>
  <p>I've tried removing all code from archive.php except the header and footer calls incase I had something in there but still no luck. The ACF field is definitely set to 'url' hence it works everywhere else.</p>
  <p>Any ideas why it converts to ID on the <code>archive.php</code> page?</p>