Categories count bug ?

If I understand you mean to say category are showing count of only published products then it is default woocommerce feature .
In case you want to show all products not only published please add the below code into your themes functions.php

// Show total product count (all statuses) in WooCommerce categories
add_filter( 'woocommerce_subcategory_count_html', 'custom_total_product_count', 10, 2 );

function custom_total_product_count( $markup, $category ) {
    global $wpdb;

    // Get product count for all post statuses
    $count = $wpdb->get_var( $wpdb->prepare("
        SELECT COUNT(p.ID)
        FROM $wpdb->posts p
        INNER JOIN $wpdb->term_relationships tr ON (p.ID = tr.object_id)
        INNER JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id)
        WHERE tt.taxonomy = 'product_cat'
        AND tt.term_id = %d
        AND p.post_type = 'product'
    ", $category->term_id ) );

    return ' <mark class="count">(' . $count . ')</mark>';
}

hope this helps to solve your query