The achievement for winning the constructor's championship doesn't unlock when you complete it. I have won it twice in My Team, and neither time did it unlock.
Ideas
EA_Groguet
Community Manager
Community ManagerHey Harrie-Harrie1
The Community Raised Issues thread has a list of some of the issues that are indeed being investigated, but that list doesn't include all the issues that are under investigation.
-Groguet
EA_Groguet Ah, I didn't know, thanks!