Gift Voucher Value not printed

Hi,

we are using woocommerce pdf product vouchers for generating gift vouchers as well as pro and template version of pdf invoices and packing slips. Now we are wondering how we get the redeemed voucher value printed on the invoice. Everything works with the “normal” discount codes generated in woocommerce but it does not work with the voucher values generated by woocommerce pdf product vouchers… I have attached a Screenshot of an order including both (discount code and vouchers) as well as of the invoice.

Order Screenshot:https://weightlifting-shop.com/wp-content/uploads/2021/08/ORder.PNG.png
Invoice: https://weightlifting-shop.com/wp-content/uploads/2021/08/Rechnung-2021-1656-615609.pdf

The page I need help with: [log in to see the link]