Hi,
I noticed you are using an elementor template for that page.
Recently a similar issue was reported, it only occured twice so far. There was a problem with the detection of the query, and I had to directly modify one of the files.
For now, you should be able to resolve it via a small custom code snippet, until the next release is out. Try adding this custom code to the functions.php in your theme/child theme directory. Before editing, please make sure to have a full site back-up just in case!
add_filter('asp_query_is_search', 'asp_query_is_search_override', 10, 2);
function asp_query_is_search_override( $is_search, $wp_query ) {
return method_exists($wp_query, 'is_search') && $wp_query->is_search();
}