In Harry Potter and the Prisoner of Azkaban (I think it was this one), Harry, at night time is seen in his room at night under his sheets doing the Lumos maxima charm, as he was underage, and in muggle society?

This scene was at the start of the .movie, and Vernon entered the room two or three times.

Why didn't the ministry do something about it as Harry still had the tracer on him?

In Harry Potter and the Prisoner of Azkaban (I think it was this one), Harry, at night time is seen in his room at night under his sheets doing the Lumos maxima charm, as he was underage, and in muggle society?

This scene was at the start of the movie, and Vernon entered the room two or three times.

Why didn't the ministry do something about it as Harry still had the tracer on him?