"Blinded by the sun" is an understandable failure-state when you design a driving system that's reliant on cameras. From https://arstechnica.com/cars/2019/05/feds-autopilot-was-acti...: "Theoretically, it should be possible to detect the side of a truck using cameras. But it's not always easy. In some lighting conditions, for example, the side of a trailer might be hard to distinguish from the sky behind it."