I tried to submit this issue through their email communication within the program.  They kicked it back to me saying I need to call the issue in.

So I did.  A really nice person, but this process is not designed with the user in mind.  It took an hour and half to get the next level up to understand and write up the issue.  They agreed it is an "unintended behavior" and will get it fixed.

Unfortunately, I believe their fix will be that a "-1" in the state field will be treated as $0 state basis reduction.  I encouraged them to create a diagnostic.

Without this, there are going to be a lot of taxpayers going forward now with a state basis reduction that never existed before.  And I doubt many tax preparers will notice.