Weekly Challenge "Repair vehicle health as Engineer" broken

Hi, 

started my challenges and did the following game mode: 

- Custom Search: Rush - certain maps

Was attacker with Tank and repaired him most of the time. Luckily the defending team was hitting him a lot. 
During match i already noticed, that the challenge did not update itself. At the end of the match i got complete matches as Engineer (1/5) and fragging 15/15 enemies (weekly) but 0/1.500 for the repair vehicle health as Engineer (weekly challenge). 

Would attach a screenshot, but the game goes always in minimze when i try to use snipping tool or print button. 

Best regards

Zax