Summary of the bug :
Look at weird AI behavior, at least one of them is always going reverse on start.
Which version of Grip were you using :
When does this happen :
On which track did it happen :
All of them
On which speed did that happen (if related to physics) :
How often does this happen :
How to replicate the steps (if reproducible) :
More details :
If you do not accelerate after start, the AI ahead of you will reverse to you and then he begins to race.
Your specs :
Core i7, GTX570 Ti, 16GB RAM
Any screenshot, or link to a video showing the bug :