In Odoo v15 I am trying to display customer address from Sales Order on delivery slip (report - printed document).

Customer and delivery address are not the same on sales order and on report when I print delivery slip by default it is showing me the same information for contact and delivery address. I tested this on runbot in v16 also - it is strange.

To solve this I inherited 'stock.report_delivery_document' and tried to replace div with name 'partner_header' inside of which should customer address display with this code:

The code is giving me info from delivery address, not from Customer that is on Sales Order.

Please help - sorry if creating module is not the way to do it.