Still working through this - however on our end we have found that if you reach that first match of the season, then exit out to the main menu to save the career, and then reenter and play the match it has loaded in fine; while if you progress from the end of the previous season directly into the match it may result in this issue.
Again, still working on a better solution, but for those getting the problem, give that a try and let me know.
This is not working, as when you try to exit the game the auto save sign start blinking and it wont do anything.