We don't want to claim the Additional Child Tax Credit this year.

My ex-wife and I have an agreement to take turns claiming our daughter on our taxes. This year, is not my turn, so I clicked the box "We don't want to claim the Additional Child Tax Credit this year."
When I press Continue, I get the following message

Good news!
You qualify for the
Child Tax Credit
Your tax return already includes this $2,000 credit.

Then when I review my credits, it's giving me the $2000 credit.

Is this option broken or something? I can't seem to opt out of claiming my daughter this year.