In a race against AI if you hit 'Restart Race' the game freezes for over 2 minutes before taking you back to the grid as per usual. While frozen you're stuck at the 'Restart your current session' dialog box and the SSD LED is showing huge disk activity. Happens with any car/series or track so far as I can tell. One possible clue to what's going on is if you restart a race while still on lap 1 then everything is OK; but if you're on lap 2 or beyond then the freeze happens. Edit: It's also happening when trying to quit a race session. Quitting while still on the first lap is fine; quitting on lap 2 and beyond will result in a freeze. Exiting from online, practice, or leaderboards = all OK.