A few minutes ago, I had this Type What You Hear exercise. My answer - Bojíme se tohohle stroje - was considered incorrect. Curiously, the correct answer given was... "Bojíme se tohohle stroje." There was no Report or Discuss button. When it came around again, I gave the same answer, which this time was accepted.
All to say, MAYBE something is not working properly on the DL side with this one. (Could have just been a glitch on my end, of course.)