Answer
First confirm whether TEST and PROD/Live are actually running the exact same IFS patch/update version — a version mismatch after a database refresh can itself cause this kind of startup hang. Try a full restart of the TEST application (Windows) server first, following the standard documented safe-restart sequence for stopping and starting IFS services on your specific track. If a full server restart doesn't resolve it, run a Reconfiguration of the TEST environment, which resets all services and ports, as the next step.