Fix API & UI Bug in PERN Stack App

I have a small web application built with the PERN stack that has a reproducible bug affecting data flow between the API and the frontend. The issue occurs when fetching and displaying records from PostgreSQL. The API responds, but the UI does not behave as expected in certain cases. This is a debugging task only — no new features, no redesign, and no large refactors. Scope of Work: - Investigate the API ↔ frontend interaction - Identify the root cause (query, API logic, or React state handling) - Apply a minimal, correct fix - Verify the issue is fully resolved Good Fit If You: - Have real experience with PERN or MERN-style stacks - Are comfortable debugging backend queries and frontend state Prefer short, focused tasks