The payment term in the item is ignored in sales orders

Summary:

The Payment terms attribute in the Item specifications is not taking it into a sales order.

Content:

For sales orders, the payment term is taken from the customer's site. And if the customer does not have a payment term configured, the sales order ignores the payment term placed on the item, and must be added manually to the order.

What function does the payment terms from the item serve if it apparently is not a default value in sales orders?

Regards.