Plugin broken by WordPress update

I got the same problem.
Previous added thumbnails aren’t visible.

I only got the Custom Field. (myposttype)_featured-image-2_thumbnail_id in each post.

Any chance that can be solved?

Thanks in advance.

EDIT : : it seems that the problem is caused when using multiple thumbnail for multiple post types.
Whan a Second thumbnail is associated with only one post type, it seems to work.
maybe it can help.

Ok, this is solved.

In my functions.php i was using wrong code.

1st code (was working with WP3.7)

new MultiPostThumbnails(array(
        'label' => 'Vignette Artiste ou Stock',
        'id' => 'featured-image-2',
        'post_type' => 'artiste',
		'post_type' => 'stock-artiste'
        )
    );

New Code (Now Working)

$types = array('artiste', 'stock-artiste');
	  foreach($types as $type) {
		  new MultiPostThumbnails(array(
        'label' => 'Vignette Artiste ou Stock',
        'id' => 'featured-image-2',
        'post_type' => $type
        )
    );
	 }