Achievement unlocked, no score (Xbone)

I've played through the first episode and when I finished it the last achievement (Devil On The Shoulder) didn't unlock. When I go into the achievements list of the game it says it's not unlocked and that I still have 50 points left to unlock for that episode. But when I go into the game itself and check the achievements from the games' menu it says I've unlocked the achievement.

I've tried to re-play the last chapter of episode 1, I've tried logging out and in with my account and I've tried a hard reset of the console (Xbox One) itself as well, but I still haven't received the last 50 points for that achievement. Is there any way to fix this issue?

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