PMP Practice: Communicate Conflict Management Principles

Sekou Camara-Bah is managing a nine-month pharmaceutical packaging facility upgrade for Oasis Quantum Computing. During the project kickoff, the team established ground rules including 'all team members will respond to project communications within 24 hours' and 'decisions require input from all functional leads before finalization.' Three months into execution, Sekou notices that Nia Rahayu-Sari, the quality assurance lead, has missed responding to five critical decision requests over the past two weeks, causing delays in finalizing equipment specifications. Other team members have begun complaining privately that Kenji's non-responsiveness is holding up their work. Sekou has verified that Kenji is receiving all communications and is actively working on other project tasks. What should Sekou do?