Weekly Challenges Counter stays on 9/10 after completing all

I'm also having the same bug now for both weeks.
In The week I complete all 11 Challenges and get the green Checkmark - like currently in Week 3.

When the weekly reset hits, the game states I've missed one challenge. When I scroll down the challenges and count them I still see 11 completed weekly challenges.

I'm playing with the EA App, Both the App and the game are up2date.
restarting the Game, EA App and PC doesn't change it.
Also tried "Repair the Game" - issue persists.

Issue also occurs in different languages.
My guess is that the problem is the optional mission, probably because it "expired" as written in the text "Läuft aus in" without a date. 

Do you also want screenshots of Week 2 and Week 3?