I'm not sure if anyone report this yet but... good news
before you do any online time trial, do a cloud save. Then try your best and even use gold to upgrade your car for best time. When you're out of time trial token, do a load from cloud save. All your tokens are back and you can continue to do time trial, again and again....
note that you may lose some R$ money (like couple hundred) because you don't earn much anyway but your online progress is all there
I have 2 devices. one : I use to do gold mining and progress, then login to GC to cloud save everyday. The other I load from cloud (save from first device) and do only online multiplayer or online time trial. I keep loading from cloud, have all the tokens and play again and again without waiting.
cheers.