I ended up using wp_query instead because I couldn’t make wp_get_recent_posts work no matter what I tried. For anyone who needs this functionality in the future, here’s the code I used:
// Get the ID of the current posts's term
$terms = get_the_terms( $post->ID, 'comic-series' );
// Only get the parent term and ignore child terms
foreach ( $terms as $term ){
if ( $term->parent == 0 ) {
// Query Options
$query_options = array(
'posts_per_page' => 1,
'orderby' => 'title', // I've ordered all my posts by title but change this for your needs
'order' => 'DESC',
'tax_query' => array(
array(
'taxonomy' => 'comic-series',
'field' => 'term_id',
'terms' => $term->term_id,
),
),
);
//Query
$the_query = new WP_Query( $query_options );
while ($the_query -> have_posts()) : $the_query -> the_post();
// Link to the latest page
?> <a href="<?php the_permalink(); ?>">LINK TEXT</a> <?php
endwhile;
wp_reset_postdata();
}
}