When a coupon condition is configured inside a Campaign Audience, the coupon information is not passed in the matchedParameters field of the RnB response. As a result, the Checkout and OrderForm do not retain the coupon data, and the OMS will not display it under marketingData.

Simulation

1. Create a Campaign Audience using a coupon condition.
2. Associate this Campaign Audience with a Campaign Promotion.
3. Complete a purchase where this promotion applies.
4. Check the Order in the OMS.
5. Review the orderForm → note that the coupon information is missing in the marketingData field.

Workaround

There is no native workaround. If possible, configure the coupon condition directly in the Promotion instead of using a Campaign Audience. This ensures the coupon information is returned in matchedParameters and saved in the order.