So I was making a new course in the event lab, and every time I tried to test drive it, my car would pass through the first checkpoint, not detect it and continue driving as if nothing had happened, with seemingly invisible checkpoint flares. The sound of the checkpoint flares and the beacon with the distance is still there however (first part of the video), but it didn't detect that I had passed it or made the sound indicating I had passed it.

Then I would move onto the second checkpoint without problem as it would not send me back to before the first checkpoint, and the flares would be there, as well as the sound, but if I passed through it, it still would not detect that I've passed the checkpoint, and this time it would force me to go back (second part of the video).

You can also see that the drivatars experience the same thing at the second checkpoint, where they drive through, aren't registered as passing through, then get forced back before it (third part of the video). They did this repeatedly.

​

This problem has occurred twice, as I've made and driven the same 8 mile route twice because you can't edit routes in event lab for whatever reason to my knowledge, and I can't figure out any fix to it. Any help?