For nearly every time trial I've done (and I've completed them all), there has been a bit of a delay, passing through checkpoints--meaning that I'll pass through one checkpoint, and it doesn't register that I've gone through it. Sometimes it lasts only a second and updates before I reach the next checkpoint, sometimes it lasts more than a few seconds and I've had to restart my race.
Also, weirdly enough, after going through one and it not registering that I've passed through it, and then restarting the race, after restarting, it will "beep", that I have passed through the checkpoint from my previous attempt, and that checkpoint will be gone, as if I'd passed through it.



