Mortgage interest deduction disappearing

My mortgage interest deduction disappears when I enter that it's a refinance of a pre-2017 loan. Then the "edit" button takes me to the same page (a loop) without letting me re-enter the flow. There is clearly some kind of TurboTax bug (both the deduction computation and the edit info flow).

 

Steps:

  • I enter my 1098 with a loan balance between 750K and 1M. Immediately the refund tallies at the top show I owe less (makes sense because of the mortgage deduction).
  • After entering the 1098, TT has a follow-up flow that says I may be eligible for a larger deduction (which I am, because it's a refinance of an old loan).
  • I enter that the loan was a refinance from before 2017. The deduction completely disappears (tallies at the top revert to before I entered my 1098).
  • TT doesn't include any mortgage interest deduction in my itemized deduction (and therefore says I should take the standard deduction). The mortgage interest still shows up on the main "deductions and credits" page, but none of it is included in my itemized deductions. Note this is my primary residence, and it has worked every other past year filing with TT.

 

Backing up a bit, the flow after entering my pre-2017 home purchase date says there may be IRS guidelines preventing a deduction, and to push "edit" next to the loan details. But when I push that button, it just reloads the same page--it doesn't show me anything new.

 

From the main "deductions and credits" page, if I go back into the 1098 entry flow, I can get back to the "We need a bit more info to see if you qualify" for the mortgage interest deduction, with two buttons: "skip for now" and "enter info" (I think it's referring to the info I already entered when I added the 1098), but both buttons take me back to the overall 1098 info page, without letting me edit the info. I have to delete the entire 1098 and re-import it to get back to that flow. So there's another TT bug (possibly related?).

 

This error has never occurred previous years using TT for the same loan.