ACF Post Object for Related Posts with Repeater Field

   <?php if( have_rows('ITEMS') ): ?>

        <?php while ( have_rows('ITEMS') ) : the_row(); ?>   

                <?php $post_object = get_sub_field('ITEM'); ?>

                <?php if( $post_object ): ?>

                    <?php $post = $post_object; setup_postdata( $post ); ?>

                       <h4><?php echo get_the_title($post_object->ID); ?></h4>

                    <?php wp_reset_postdata(); ?>

                <?php endif; ?>

            <?php endwhile; ?>

<?php endif; ?>