I can't speak directly to that.  However, we opted to e-file our farmers in advance of the form 3800 being marked final after calling Lacerte again and them recommending we attach the form 3800 as a PDF to the tax return (after completing it from the IRS website), they had us clear the critical diagnostic for Form 3800, by highlighting the tax return, then by going to E-File; e-file Support tools; Disable e-file Error; then had to go back to the tax return and e-file immediately.  They said we'd have about 10 seconds to e-file the tax return after clearing the diagnostic. Seemed to work.  Frustrated with Lacerte and hope that this doesn't provide our clients with letters from the IRS.  

If you are finding errors with what they call a final Form 3800, I'd call them and also  submit a new question via Lacerte to make sure it receives attention.  I'd also call them for specifics on the guidance they gave me if any of that can assist you. 

I expect the diagnostic is now removed since they have marked the Form 3800 final and clearing the diagnostic as I did is no longer needed.