Broken achievement

Hello dear racer,

I am posting today because i passed the level 6 for my pilote career and the achievement did not unlocked. I noticed that achievement sometimes appear about 30sec after making it. But when i passed the level 6, i was not aware about this situation, so i quit the game right after passing the 6th level.

I hope that someone can help me, and i hope that the dev team can fix it

I let a picture of my achievement to see that i unlocked the 8 level but not the 6.

Regards