Why in my return showing my retirement distribution non-taxable

I use TT Deluxe. Been using TT for years. Until now (TY2025), when entering my CSA 1099R info in TT (TurboTax) I have always left box 2a blank since it is marked UNKNOWN, based on feedback from TT. Now, doing my taxes, the Gross distribution displays non-taxable, when in previous years, it would show the taxable amount. TT should be using the simplified calculation since I do enter the amount in box 9b and box 5.  I was 85 in TY2025. would this make my gross distribution fully non taxable?  I am asking since Iget the additional $6000 being over 65 on top of my standard deduction (single) and my refund is HUGE - $5700. i did review past years TT returns and I always had taxable income. If I manually type the gross ditribution in box 2a, my refund drops to $500. Is there an issue with TT deluxe 2025?