title: Wordpress Advanced Custom Fields display field not working in loop
body: <p>I am using Advanced Custom Fields with Wordpress.
  I have a custom post type called VIDEOS which has two fields - <strong>video_link</strong> and <strong>video_artist</strong>.</p>
  
  <p>I can call and output the <strong>video_link</strong> field, but I cannot seem to display the '<strong>video_artist</strong>' field using the code below...</p>
  
  <pre><code>&lt;?php 
     $posts = get_posts(array(
     'post_type'          =&gt; 'videos',
     'posts_per_page'     =&gt; -1
     )
     ));                  
     if( $posts ): ?&gt;
  &lt;?php foreach( $posts as $post ): 
     setup_postdata( $post )                  
     ?&gt;
  &lt;?php echo wp_oembed_get( get_field( 'video_link' ) ); ?&gt;
  &lt;?php the_title(); ?&gt;
  &lt;?php the_field('video_artist'); ?&gt;
  &lt;/div&gt;
  &lt;?php endforeach; ?&gt;
  &lt;?php wp_reset_postdata(); ?&gt;
  &lt;?php endif; ?&gt;
  </code></pre>
  
  <p><strong>In fact, this line...</strong></p>
  
  <pre><code>&lt;?php the_field('video_artist'); ?&gt;
  </code></pre>
  
  <p><strong>...breaks the site and displays nothing at all after it appears. No html of any kind.</strong></p>