Fiduciary last name is lost by TT Business 2021

I moved since last year's return.  So I edited my address on the Here's Your Summary screen.  It says (because the Trustee is a person) the IRS now requires the Trustee's first and last names must now be entered separately.  Ok; did that. 

 

But by the time I get to the Let's Verify Name and Address screen, it's forgotten I have a last name.  (The Form still has it correctly; only the step-by-step screen has lost my last name.)


Where can I report that software bug?