The issue appears during invoicing process from project based on the created sales order on the project. If sales order lines are used to create invoice proposal, on the invoice proposal form there is no information about the referenced sales order ID. There is also no possibility to add the filed by personalization (Insert columns...) It causes much inconvenience because the person responsible for creating invoice proposal has to look on all sales orders created on the project in a different screen, compare and search for the correct line.
During project lifecycle quite many sales orders could be created and double checking extends the time and make the process not optimal.
The sales order ID field with reference to the sales order where the sales order line has been created should be added to the invoice proposal form. It is applicable for invoicing sales order lines scenario (Transaction origin = Sales order).