Oddly, Duolingo indicated that I gave the wrong answer after a bit of a delay. Has anyone else had similar problems?
My answer: הכריכים טעימים.
Correct solution: הכריכים טעימים.
I reported the correct solution as having an error (or bug) because there wasn't a better option.
It worked the second time around, providing the exact same answer. Perhaps it was due to the connection timing out, which hasn't otherwise been a problem.