Hi,
I noticed something weird. I created an order with two products lines. One has a 5% discount. Because this is an order which can be renew every month, I used to clone it when I need to send the new order. But the discount is automatically disabled and even if I add it manually, it won’t set up.
I could investigate further but I thought the maybe it could be a known bug. Let me know if you have the same problem.
I used the 3.0.0 version.
Regards