Team behavior problems are creating conflicts, causing loss of momentum and sprint delays. How should the project manager handle this?

The most effective approach is to revisit ground rules and communication protocols, then facilitate an open discussion about the current issues. This empowers the team to self-correct, reinforces established norms, and promotes a collaborative solution, which is central to agile principles. Engaging a counselor is an external intervention that might not address the root cause within the team's dynamics. Controlling backlog assignments and reducing direct communication would hinder collaboration and transparency, worsening the problem. Requiring a day off is a punitive measure that avoids addressing the conflict and can foster resentment.