In what situation might your high-beam assist be unable to dim your vehicle’s high beam in good time when encountering oncoming traffic?

You answered correctly. High-beam assist systems can struggle to detect oncoming vehicles in time when you are driving over a summit or around a bend. In these situations, the sensors might not see the headlights of oncoming vehicles until the last moment, causing the high beams to dim too late and possibly dazzle other drivers. Being aware of this limitation helps you use your high beams responsibly, especially in such scenarios. The situation with being dazzled by an oncoming vehicle does not affect the function of your own high-beam assist in the same way. In summary, always be cautious and prepared to manually dip your headlights if you notice these conditions.