The last item is numbered forty-nine, the first, 0, That's fifty items.
BUG Api - Lesson leaderboards returns 49 players, not 50

The last item is numbered forty-nine, the first, 0, That's fifty items.
That's true for all categories unless "lessons" as @Mig_Well said. I confirm. Player with rank 43 is missing.
lessons[41]['rank'] == 42
lessons[42]['rank'] == 44

@tortortoises3 You can check the other posts above. I know that in a list of 50 items, they are commonly counted from 0 to 49. So having the last item being number 49 is not surprising but also unrelated to this issue I reported.
If you open https://api.chess.com/pub/leaderboards, you'll see that the lesson list only contains 49 items (going from 0 to 48) instead of 50 (going from 0 to 49).
Hello,
Well, what the title says
I noticed a bug in the API to fetch leaderboards (https://api.chess.com/pub/leaderboards). All categories seem to work properly with the exception of lessons which returns only 49 players instead of 50.