Blinded by the light ...
... that's one of the major risks that Tesly took for a long time, relying solely on optical sensors and some dubious software trying to make sense of their output.
There are experienced car manufacturers and related subsystem suppliers around, who always knew by heart that optical sensors can get blinded by direct sunlight and other conditions, and therefore are not good enough as the sole source of information about the driving environment. So they are using radar sensors too, since many years. And they don't promote their driving asssistance systems as "Autopilots" ...
Tesla caught up only recently to the use of radar sensors. And there are a few other things they still have to learn.