Why is the start-stop system in my Audi A1 not working?

I have noticed that the start-stop system in my Audi A1 is not working properly, as it does not shut off the engine when I come to a complete stop. What could be causing this issue and how can I fix it?

It is possible that there is a malfunction in the sensors or control module responsible for detecting when the car is at a complete stop. I suggest bringing your car to an authorized Audi service center for a thorough diagnostic check.