Let's perform some troubleshooting steps to determine if this is a browser-related issue, bill192.
Start by clearing your browser's cache to refresh your system. This removes outdated files that can cause issues. Next, ensure to use a supported browser for optimal performance with QuickBooks. Then, reprint your invoice.
If the issue persists, contact our Live Support Team. Our representatives are ready to securely review your account and assist you with the next steps. You can reach them through your QuickBooks software. Check out the image below for visual reference.

Lastly, you can manually export your data in QuickBooks Self-Employed for future reference.
If you have further questions about managing your invoices, comment below.