Rather than admit that the red, undocumented third parameter was a mistake they seemed to make all sorts of rationalizations for why it’s wrong (“It’s new”, “I thought it was fixed”, etc.) rather than just saying “You’re right, that’s a bug. We’re fixing it.” Why were the employees waffling around the fact that it actually is a problem? Calling them out on their justifications and excuses isn’t being toxic or nasty, it’s called being a professional who takes pride in the work they put out to the public.