id was called incorrectly. Order properties should not be accessed directly

Hi,

First off, thank you for the plugin its been an excelent addition to the website checkout process.

We are getting a ton of Woocommerce errors show up when a user goes through the paypal checkout, 1 of the errors is pasted below but there is one of these for every field passed to paypal

[Thu Jun 01 03:37:37.784879 2017] [:error] [pid 29326] [client ##########] billing_email was called incorrectly. Order properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), do_action(‘template_redirect’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, WC_AJAX::do_wc_ajax, do_action(‘wc_ajax_checkout’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, WC_AJAX::checkout, WC_Checkout->process_checkout, WC_Checkout->process_order_payment, WC_Gateway_PPEC->process_payment, WC_Gateway_PPEC_Checkout_Handler->do_payment, WC_Gateway_PPEC_Checkout_Handler->handle_payment_response, WC_Order->payment_complete, WC_Order->save, WC_Order->status_transition, do_action(‘woocommerce_order_status_processing’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, WooChimp->on_completed, WooChimp->prepare_order_data, WC_Abstract_Legacy_Order->__get, wc_doing_it_wrong. This message was added in version 3.0., referer: https://WEBSITEDOMAIN/shop/checkout/?woo-paypal-return=true&token=EC-2JV26557BF195862H&PayerID=P9NRZ3CGPLQHQ