MBFP query not working

Hello Yasmine,

I use the same code on my demo site and don't see the issue. Please add the code to a page template in a standard theme of WordPress without using your custom plugin/theme and recheck this issue.

$current_user = get_current_user_ID();
$post_ids = get_user_meta( $current_user, 'mbfp_posts', true );

$the_query = new WP_Query( [
   'post_type' => 'research',
  'post__in' => $post_ids,
   'posts_per_page' => -1,
]);

// The Loop.
if ( $the_query->have_posts() ) {
	echo '<ul>';
	while ( $the_query->have_posts() ) {
		$the_query->the_post();
		echo '<li>' . esc_html( get_the_title() ) . '</li>';
	}
	echo '</ul>';
}

wp_reset_postdata();