Bug in Quiz Mode

I still like the app and use it weekly for my daughters spelling words. However, in the new update when taking the quiz, the OK button is grayed out. You can hit done on the keyboard to move on, but my daughter spent several frustrating minutes on this before we figured it out. This time would have been better spent actually taking the quiz and studying words. I recommend the app, but please address this disappointing issue.

PizzaEaterRob about SpellBoard