RMA vs Discount on order line

Hello,

I need your help please to better understand the RMA process:

1- I have a customer order line with discount that is invoiced.

2-  I have created the RMA from the customer order line: The price showing on the RMA line is full price not including the discount.

3- I have created a credit invoice from the RMA line: the credit also showing the full price not including the discount.

My question is: should the RMA line retreive the price including the discount from the order line? Or we need to add the discount manually when we create the credit invoice?

Thank you!