I understand how this issue greatly impacts your business, Bar.

There's an ongoing issue about the quantity and rate not showing on invoices. Our product engineers are working to get this fixed. As a workaround, you can make the product or service item inactive. Then, recreate them as new to resolve the issue.

In the meantime, I suggest reaching out to our support team so you will added to the list of the affected users. This way, you'll be notified once the issue is fixed. Here's how to reach them:

Furthermore more. learn how you can record the payment to connect it to the invoice to balance your account. I've added this article for more information: Record Invoice Payments In QuickBooks Online.

Reach out to us if you have further questions when converting estimates to invoices. We're here to cover all your needs.