Coupon codes not showing in invoice

[DesignDesignInc]

Preconditions

1. Magento 2.1.7

Steps to reproduce

1. Apply a coupon code and then place an order.
2. Coupon code shows on order, then try to invoice order.

Expected result

1. Invoice and Order to show the same coupon code and totals.

Actual result

1. Invoice doesn't show coupon code and invoice totals don't reflect the discount.

[RomanKrut]

@DesignDesignInc Hi. Thanks for the feedback. We already know about this problem. The internal ticket already exist MAGETWO-69705 to address this issue.