I alawys exit all my games the proper way, hit guide button to to dash. Hold guide button chose yes to shut down. But for some weird reason my profie has gotten messed up. I can do my career and it works. But when I do challanges right when it comes to the screen where I can see my car, it freezes. DOesn't matter the challenge.
So I thought, what if I create a new profile. BINGO. All challenges work and now I'm redoing my blacklist races again. Not happy but at least I figured out what went wrong. Just thought I'd share.