Earlier quoted context omitted.
That is a very intriguing scenario indeed. Due to the non-deterministic nature of many self-driving systems, I'd reckon a broader investigation would have to follow. Should that investigation reveal a reproducible behaviour, a recall or general suspension of vehicles running that particular software version would seem like a reasonable response. Otherwise suspending just that one car could be an option. It's uncharte…
How is it non-deterministic? If you run the same trained model on the same input data, you should arrive at the exactly identical output.
It's non-deterministic in a practical sense; you cannot reproduce the exact circumstances that caused a certain behaviour. Maybe a bug flew by one of the cameras at a certain moment, or a pedestrian with certain type of clothing passed by. You get the idea.