Did you mean that the invoice template had been changed? As a primary admin, you have the ability to personalize and use a different template for your invoices.
Here's how:
Go to the Gear icon.
Choose Custom form styles.
Select the invoice template or click on New style button, then Invoice to create a new template.
In the Design tab, hit Change up the template to select a fixed invoice layout.
Press Done once finished.
If you have other invoice templates and want to use it as your default, just go to your Custom form styles, click the drop-down in the Action column and select Make Default.
You can also provide comments or feedback to our Product Development Team so that they know what to consider if these features need to be improved.