Hi,
We are aware of this issue and are looking to fix it ASAP. Unfortunately we haven't been able to reproduce this reliably. Can you give us any additional information such as Which track, No. of players, did anyone quit mid game, what position were you in when it went wrong etc. It appears that when a car that isn't in first place crosses the start / finish line and the timer is at zero, it triggers the white flag. Only the player in first place should start the white flag sequence.
You help if very much appreciated.