Durations of Scrum Meetings
The timebox is set for the meetings as daily scrum, retrospective etc. What happens if the team completes the event earlier. Is is a sign of something goes wrong or is it possible time to time?
Other than the sprint itself (which is a container for other Scrum events), scrum events may end (earlier) when the objectives of the event are met. Reference the Scrum Guide's "Scrum events" section.