So, I am just successfully finishing my lesson, receive all the points and bonuses.
When the screen goes back to the “learning path”, I see how the “green circle” around my current lesson block goes smaller, and the lesson I just completed is “unlearned” again.
In the block of 6 lessons that bug appears once or twice, so to finish it I need to pass not 6 but 8 lessons.
Does someone else have such a problem?
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I don’t know… I am currently learning German, and I can notice such behavior for several months already.