WordPress will automatically create a Mine view for post types that have multiple authors. With a recent change to WooCommerce core, the customers are now the author of the orders, so Mine is showing and causing confusion. This filter will remove Mine from orders.

jp_filter_edit_shop_order_views.php

<?php // do not copy this line

/**
 * WordPress will automatically create a Mine view for post types that have multiple authors. 
 * With a recent change to WooCommerce core, the customers are now the author of the orders, so Mine is
 * showing and causing confusion. This filter will remove Mine from orders. 
 * 
 * @param  arr $views The current views being used for orders. 
 * @return arr        The edited views array. 
 */
function jp_filter_edit_shop_order_views( $views ) { 
    // Unset the Mine option. 
    unset( $views['mine'] );
    return $views; 
}; 
add_filter( 'views_edit-shop_order', 'jp_filter_edit_shop_order_views' );