Automation Test Track Traffic Issu

The automation test track was the only track where traffic used to drive in the left hand side. Now for the last couple of days, traffic has started driving in the right side in the automation test track similar to other USA-based tracks. It spawns in the left-hand side, and then suddenly all cars try to switch sides and causes a lot of collisions. Is anybody else facing this problem? I did mess with the world editor a couple of days back, so I am not sure if it is because of some mistake that I did. I tried reinstallation, but it has not fixed the issue.