Japanese from English
This is still in beta, so I suppose it is a good thing to mention such problems. A few lessons bug, and repeat the same three exercises indefinitely. Particularly the Level 6 Activity 1 second lesson.
Time 2 Lesson 3, where they talk about number 10, it gave me the same "Choose the correct number for this" - task at least 5 times in a row and then only the last one was different.
Dates, 3/5. The only activity I get are translating "It takes one year" to Japanese, and vice versa. Figured it may have been the browser or the machine I used, but is the same everywhere.
This also happened in Hobby 1 or 2, damned if I remember which, about playing the piano.