There has never been any bug that prevents you from being able to enter your year-end balance in traditional IRAs. Click the continue button on the Your 1099-R Entries page to reach the question that asks for this. (However, if you have entered no Forms 1099-R reporting a distribution or Roth conversion from a traditional IRA or have no basis in nondeductible traditional IRA contributions, TurboTax has no need to know your year-end balance in traditional IRAs for Form 8606.)
