I have seen this when I finish a practice or a lesson at the english from french lesson. At the end of the lesson, at the screen where you see the summary of the lesson, there is a progress bar with points needed to the next lesson, but there is a "/" missing separating the current points from the points to the next level.

Here is what I see: NIVEAU SUIVANT 13341500 XP 18

instead of: 1334 / 1500 XP