It's a driver assist feature add-on after all. Human override is required at those .1% cases. Having said that, it's no different than when adaptive cruise control feature was first released or when GPS turn-by-turn navigation was first unveiled. They all warned you those are complementary driver assistances that don't replace driver to press the gas pedal or guiding directions because in rare cases(.01%?), those features don't work.

If we were to require a 100% accurate GPS navigation or a 100% working adaptive cruise control before they can be released to the market, we wouldn't have them even by now.