Unable to save nested handling units

As portion of the goods shipping process, we would similar to show the details of the handling units successful the packing database arsenic provided successful the shipment. Packaging instructions person been created to alteration the instauration of nested handling units.

To initiate the handling portion instauration process, I usage the pursuing exertion :

Once the accusation is entered, we tin spot the desired hierarchy based connected the packaging instruction. (See representation below)

After clicking connected "Create and prevention handling unit," we person confirmation that the handling units person been created and saved. However, aft this save, I americium incapable to retrieve each the information, whether successful the inventory oregon the packing list.

Is determination a missing measurement successful the handling portion instauration process ?

Could you delight assistance maine with this ?

Thank you successful beforehand for your help.