IC flashcards - No indication for correct answers?

[dmdclep]

I have no idea what I pressed, but partway through the Poetry flashcard set for Humanities, I stopped getting the red/green indicators for responses. Now the cards just proceed to the next responses without feedback on whether the response was correct or incorrect. I tried closing/reopening my browser and also enabling/disabling the explanations.

Anyone know how to resolve this issue? Thanks!