WP Query causing timeout

I have figured out. I was missing $query1->the_post(); in the while loop and wp_reset_postdata(); after the loop ends.

Final working code:

<ul class="pie-chart__legend" id="donut1">
                                    <?php
                                    $wcatTerms1 = get_terms('incident_type', array('hide_empty' => 0, 'parent' =>0)); 
                                    foreach($wcatTerms1 as $wcatTerm1) 
                                    {
                                        
                                        $args1 = array(
                                        'posts_per_page' => -1,
                                        'post_type' => 'incident',
                                        'post_author' => $current_user->ID,
                                        'post_status' => 'publish',
                                        'tax_query' => array(
                                            array(
                                                'taxonomy' => 'incident_type',
                                                'field' => 'term_id', 
                                                'terms' => $wcatTerm1, 
                                                'include_children' => false
                                            )
                                        ));
                                        $count1 = 0;
                                        $query1 = new WP_Query($args1);
                                        while ( $query1->have_posts() ) 
                                        { 
                                            $query1->the_post();
                                            $count1++;
                                        }
                                        ?>
                                        <li><em><?php echo $wcatTerm1->name; ?></em><span><?php echo $count1; ?></span></li>
                                        <?php
                                        wp_reset_postdata();
                                    }    
                                    ?>
                                </ul>

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