Thanks for providing us with a screenshot, @beta-brain.
Let perform some troubleshooting steps to isolate this issue. I recommend deleting and recreate the invoice then send it again to your customer.
However, if the issue persists, I suggest contacting our Merchant Support team. They have the right tools to securely look to your account and investigate this matter.
Additionally, I got you this article that provides detailed information on how you can personalize your invoice: Use and customize form templates.
You're always welcome to post here anytime you have other concerns. I'd be happy to work with you. Have a wonderful day and take care!
