There appears to be a bug in the "What-If" Worksheet

I wanted to evaluate the difference in Total Tax for married couple when filing jointly vs separately (Tax year 2024; desktop version).
We have two children so we get a $4,000 tax credit when filing jointly

We have completed our return
I opened the "What-If" Worksheet, and checked the box to compare "filing jointly vs separately ".
On line 51, it correctly show the $4,000 child credit for a joint return.
However, for the individual column it also shows $4,000 Tax credit for each person.
I believe this is a bug; I think that it should show a Tax credit of $2,000/person!?

How can we report bugs to Intuit? I tried to call their "Tax Expert" line but she had clue what I was talking about...