Search by Title on Custom Post Archive

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Hi there, I have a custom post type archive that I’m using pre\_get\_posts on and I also would like to add form to search them by title. Issuing being is that when I perform a search with the form I see all posts instead of the of expected results. What I have noticed is on a page that I DO have it working, query monitor catches the ‘s’ parameter, but on this particular page it doesn’t. Any ideas?

archive-researcher.php

<?php get_header(); ?>

<div id=”site-content” class=”content-area”>
<main id=”main” class=”site-main”>
<section class=”hero” style=”background:url(‘<?php if (has_post_thumbnail()) : the_post_thumbnail_url() ?>’)
<?php else : echo get_stylesheet_directory_uri(); ?>/image/default-hero.jpg’) no-repeat center center/cover;
<?php endif; ?>”>
<div class=”container d-flex flex-column align-items-center position-relative”>
<article>
<div class=”hero-content”>
<h1 class=”text-center”>
Contact Researchers
</h1>
</div>
</article>
<img class=”overlay” src=”<?php echo get_stylesheet_directory_uri()?>/image/overlay.svg” />
</div>
</section>
<section class=”my-4 section”>
<div class=”container”>
<form method=”GET” action=”<?php echo get_post_type_archive_link(“researcher”); ?>”>
<div>
<input type=”text” name=”r_name” id=”r_name” placeholder=”Search”
value=”<?php echo get_query_var(“r_name”, false); ?>”>
</div>
<div>
<button>Search</button>
<a href=”<?php echo get_post_type_archive_link(“researcher”); ?>”>Reset</a>
</div>
</form>

</div>
</section>

<section>
<div class=”container”>
<div class=”row”>
<?php if (have_posts()): ?>
<?php while (have_posts()): the_post(); ?>
<div class=”col-12 col-lg-4 d-flex”>
<?php get_template_part(‘template/card’, ‘researcher’); ?>
</div>
<?php endwhile; wp_reset_postdata(); ?>
<?php else: ?>
<div class=”col-12″>
<p>No researchers found.</p>
</div>
<?php endif; ?>
</div>
<?php understrap_pagination(); ?>
</div>
</section>
</main>
</div>

<?php get_footer(); ?>

functions.php

function add_query_vars_filter($vars)
{
// add custom query vars that will be public
// https://codex.wordpress.org/WordPress_Query_Vars

//researchers
$vars[] .=”r_name”;
//resources
$vars[] .= “r_title”;
$vars[] .= “type”;
$vars[] .= “topic”;
$vars[] .= “crop”;
$vars[] .= “research-area”;
$vars[] .= “resource-author”;
$vars[] .= “resource-year”;
return $vars;
}

add_filter(“query_vars”, “add_query_vars_filter”);
function researcher_archive($query)
{
// only run this query if we’re on the researcher archive page and not on the admin side
if (
$query->is_archive(“researcher”) &&
$query->is_main_query() &&
!is_admin()
) {
// get query vars from url.
// https://codex.wordpress.org/Function_Reference/get_query_var#Examples

// example.com/researcher/?r_name=steve
$name = get_query_var(“r_name”, false);

// Add search parameter for post title
$query->set(“s”, $name);

$query->set(‘posts_per_page’, 12);
$query->set(‘orderby’, ‘wpse_last_word’);
$query->set(‘order’, ‘ASC’);
}
}
add_action(“pre_get_posts”, “researcher_archive”);

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