When a project team is experiencing behavioral issues and conflicts that affect the project's momentum, it is essential for the project manager to address these issues promptly and effectively. The PMBOK Guide suggests that revisiting and reinforcing the ground rules and communication protocols can help realign the team's focus and resolve conflicts. By facilitating a discussion about the current issues, the project manager can encourage team members to express their concerns and work collaboratively towards a resolution. This approach promotes transparency, understanding, and mutual respect among team members, which are critical for maintaining a productive team environment and ensuring the success of the project.
References: The principles for this answer are based on the conflict resolution strategies outlined in PMI's resources, including the PMBOK Guide and other project management literature that emphasizes the importance of clear communication and established protocols in managing team dynamics. While I cannot provide direct links to the specific documents, the approach aligns with PMI's standards and guidelines on project management and team conflict resolution.