Sr Interactive Developer

So it looks like I created the issue by using ‘$id’ variable within my loop statement.

ex:

$loop = new WP_Query( array( 'post_type' => 'work_type', 'posts_per_page' => 9 ) );
while ( $loop->have_posts() ) : $loop->the_post();
$id // This created the issue.
get_the_post_thumbnail( the_ID(), 'thumbnail' );
endwhile;