Here's an interesting bug for your development team.

Create a new customer. Type in a first and last name. Tab out of the Last Name field.  The name appears under Address Details in the Invoice/Bill To field.  Click the edit pencil button, and you'll see the customer's name appears at the top of the Address field.  That's not right.  That field should be for a street address or PO Box, not a human's name.
This bug could explain how the larger problem of customer names not printing on invoices got released to Intuit's customers.  Please fix the bug and the test that should have caught it.