Are you using a plugin like WP All Import to update the posts? If so, you would need this code in your child theme’s functions.php file:
add_action('pmxi_saved_post', 'wp_all_import_post_saved', 1000, 1);
function wp_all_import_post_saved($id) {
do_action('search_filter_update_post_cache', $id);
}
If you are also using Relevanssi (a third party text search replacement plugin) and have set the form to use it for text searches, it would need to be this:
add_action('pmxi_saved_post', 'wp_all_import_post_saved', 1000, 1);
function wp_all_import_post_saved($id) {
do_action('search_filter_update_post_cache', $id);
relevanssi_index_doc($id, true, relevanssi_get_custom_fields(), true);
}
.
