Problem of copying text from service order to billing document item level texts

We encountered an contented erstwhile displaying the invoice signifier from a work order. The occupation is arsenic follows: aft making a substance enactment astatine the point and header level of the work order, this enactment (message) cannot beryllium transferred to the invoice. Since it doesn’t transportation over, we are incapable to show it connected the invoice form. Has anyone faced a akin issue, and what would you suggest arsenic a solution? Thank you.