qBittorrent's SavePath was /downloads and no such directory existed in the container, so the download client had no working destination and nothing downstream could see its output. It now mounts the same NFS export the arrs use, narrowed to the downloads subtree via subPath — one mount, so the EXDEV hardlink trap the bulk-tier test guards stays closed. PUID/PGID are load-bearing: the export is owned 1000:1000 and the image's default 911 is denied.