2025 Illinois Underpayment Warning - Calculation Bug?

[Vollpreuss]

I'm receiving a tax underpayment warning for my 2025 Illinois State Tax return.  The tax liability being presented does not include the 4 estimated quarterly tax payments made for the 2025 tax year.  I have a refund due when the estimated tax payments are considered.   Why am I being alerted to a potential underpayment?  Is this a calculation bug or?   For now, I'm going to skip the annualization method and take the let Illinois figure out any penalty (if any) to expedite my tax return.