I had a similar issue in the lobbies. There would be a start and some cars would stand still but they would still appear to be moving based on the gaps. Weird...
I believe he is referring to the bug when the race starts you get countdown 3 2 1 but no cars including yourself cannot move/drive they just sit there doing nothing. Ive seen it about a dozen times in lobbies but havent seen it yet in sport mode.
In the online lobbies we all had to pull out of race and start another one.
I'm so tired of this bug. It happens in 1 out of 3 races for me in hosted lobbies. It's getting real old. Kaz should be ashamed of releasing a gaming in this poor condition.