/**
 * This code snippet prevents the Review Authors addon from removing the
 * name and email from a review when it is edited on the frontend with a
 * custom Review Form that does not include the name and email fields.
 *
 * This code snippet can safely be removed from the website after
 * the Review Authors addon has been updated to v2.0.0 or higher.
 */
add_filter('site-reviews-authors/update/review-values', function ($values, $update) {
    $review = glsr_get_review($update->request->review_id);
    foreach ($values as $key => $value) {
        if (!$update->request->exists($key)) {
            $values[$key] = $review->offsetGet($key);
        }
    }
    return $values;
}, 10, 2);