I can consistently reproduce it with the following settings:
- (Wanikani) Script compatibility = OFF
- (Double-Check) Lightning mode = ON
- (Double-Check) all other settings on default
I gave the correct answers for both reading and meaning for the last item
Edit: It also happens to me with Lightning Mode = Off.
I did notice that it seems to expect another item in the review queue?
Edit2: And Script compatibility = ON fixed the issue again, same as just disabling the Double-Check script