Smart Post Show content hook crash

add_filter( 'sp_pcp_the_content', function($post_content){
	if (preg_match('/\[smart_post_show id="\d+"\]/', $post_content)) {
		$post_content = preg_replace( '/\[smart_post_show id="\d+"\]/', '', $post_content );
	}
	return $post_content;
} );