There were supposedly two driverless cars in play just from reading the bot below so that makes me immediately think that the cars were not in the same lane but it doesn’t state that.

Going to a different website reveals that to indeed have been the claim. “When we arrived at scene, the only open lanes for egress from the call were blocked by two Cruise vehicles that had stopped and were not moving or leaving the scene. We were unable to leave the scene initially due to the Cruise vehicles not moving. This delay, no matter how minimal, contributed to a poor patient outcome,”

The main disagreement here is between whether or not the driverless cars completely stalled and blocked the way or only one stalled and the other kept driving which is what the car company is claiming happened.