I would like to learn what is the responsibility of a scrum master If the team is committing to more work in a sprint than their capacity and failing to achieve their commitment.
In my recent role as a scrum master I get blamed for not telling the team to reduce the workload they have committed. In my opinion I can only highlight the issue to the team that they need to wisely plan the next sprint (if team didn't fulfil commitment in previous sprint) but I believe I don't exercise the authority to interrupt them while they make commitment.