isAIControlled flag not working properly.

So I loaded up the grid map and followed a tutorial on how to add an AI, which didn't work as intended. We have vehicle A and vehicle B. I want to drive vehicle A and have an AI control vehicle B. I tick vehicle B to have AI, and vehicle A starts being AI controlled. I tick Vehicle A to be AI controlled and Vehicle B starts driving on its own. I simply replace the models of each car to the cars I wanted (a police chase) and then the opposite vehicle becomes AI controlled.

I gave up trying...

isAIControlled flag not working properly.