Cannot consolidate different item requirements into 1 purchase order when using group by vendor at firming the purchase orders related to projects with the same vendor.

The customer have different sub-projects on the same location and they want to consolidate several item requirements from different sub-projects into one purchase order (PO). Even if they choose Group by vendor when they firm planned PO's the items is not consolidated into one PO. The site and warehouse dimensions are the same on all the requirement lines.
Today we end up with different PO's which means more transportation cost and more receive handling.
When you then receive the items on the PO Dyn365 should ask to consume it into the project based on the marking of the PO line. If the PO line is marked to a Project sales order it should ask to consume into the project connected to the sales order on the marking.
This is important functionality for a project based company. This is a way of getting number of keybord-/mouse-clicks down to a minimum.