As stated here (League table seems to be stuck), the leaderboard isn’t showing progress. It does show on your streak though, which is good (I have a 49 day streak today and am aiming for 50! 
).
I had the same problem with my Greek lesson. It works again, but I lost around 20’000 points… I supposed I will not get them back. Too bad. I’ll have to work harder 
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