Same here - this is happening on returns where this has never **bleep** of returns and then get the failed diagnostic and have to go back to each of those returns to bypass.  As a previous person commented, it is only the first four significant letters of the last name that is matched so I don't see why changing something in the first name field makes a difference - last name is still the same no matter how long it is.

Wish this would get fixed - an annoyance that is not needed at this time.