Can we have one single invoice for orders having positive and negative value

The requirement is

1. Have an order with positive invoice amount.

2. Have another order with same customer, attributes, order types but with negative invoice amount. Meaning the quantity is positive but the amount is negative. We do have a grouping rule which groups orders and gives a single invoice.

But the issue we face is whenever we have a negative amount order(please note this is not credit memo), it is not grouped. Can you confirm if this is a standard functionality in oracle that grouping rule will not work for the negative balance eventhough all the attributes are similar.

Also i tried looking into oracle support and got an ER exiting for having original order and return order(credit memo) in single invoice.