I have a car with a similar feature. It can be erratic (on/off a lot) in certain situations where there is a lot of lights/signs around. But typically I don't have brights on there. Haven't noticed any degradation with age, but certainly possible.

For context, this is demonstrating a more advanced "automatic brights" system albeit somewhat rudimentary compared to some of the newer LED projectors (e.g. Audi, Mercedes). Turning on your brights is still opt-in. Normal brights don't turn off automatically for pedestrians