I have three 1098 for my home. 1st the initial loan. 2nd a refinance of the 1st loan. 3rd from refi resale to another lender. The 3rd 1098 zeros out the deduction. Why?

It's like turbotax can't handle three 1098 forms. It's fine with two. When I add the third, it zeroes out the savings in the calculator. I might as well do this by hand instead of using the software.