The reflections from glasses are often blamed for this flaw but direct sunlight could definitely create a blind spot. The roof glass could be amplifying the sunlight at certain times of day. I am curious if there is a solution like a small shield for the sensor.
The requirement to buy a premium package without knowing the actual cost is frustrating. Until we have more information about its heat management and price it's risky to commit so it is better to wait for reviews and check the real world experience of the car owners.