DO NOT USE THIS FOR PINKS OR TRADING CARS (thanks Pirate
This is in reference to the Samsung Galaxy S4 phone (not sure if it works on other phones).
So like everyone else, after updating to KitKat 4.4.4 the game would freeze on the race launch screen (intro video still works) or just plain crashes (no error code pop-ups) back out to the OS.
Temporary fix: during campaign mode, the first race will be ok (no freeze/crash), before you start second race - play the driver's challenge but foul right away (you don't want to beat it as you need the driver's challenge for this fix). Then go back to the campaign race. You'll need to do this on each race until you finish the level. If you forget to run the challenge it will throw the process out of wack and you'll get the freeze/crash. You'll need to either run the campaign race (without running the daily challenge) or running the daily challenge again and then run the campaign race until you get a good race (then before the next race, do the challenge first).
This will work for the multiplayer mode as well (just remember to run the challenge) I've been able to replicate this on two S4 phones after the update (not great but usable). Let me know if it works for you guys.