[BUG] Transmission putting download folder in root

Hi,

Since some time I have the strange behavior with Transmission that the application puts the download folder in the root directory of the NAS. Although in the config the folder is set to /data/Transmission/Incomplete. See my config.json:

{
    "alt-speed-down": 2000, 
    "alt-speed-enabled": false, 
    "alt-speed-time-begin": 0, 
    "alt-speed-time-day": 127, 
    "alt-speed-time-enabled": true, 
    "alt-speed-time-end": 390, 
    "alt-speed-up": 100, 
    "bind-address-ipv4": "0.0.0.0", 
    "bind-address-ipv6": "::", 
    "blocklist-enabled": true, 
    "blocklist-url": "http://list.iblocklist.com/?list=bt_level1", 
    "cache-size-mb": 4, 
    "dht-enabled": true, 
    "download-dir": "/data/Transmission/Downloads", 
    "download-queue-enabled": true, 
    "download-queue-size": 5, 
    "encryption": 1, 
    "idle-seeding-limit": 30, 
    "idle-seeding-limit-enabled": true, 
    "incomplete-dir": "/data/Transmission/Incomplete", 
    "incomplete-dir-enabled": true, 
    "lpd-enabled": true, 
    "message-level": 2, 
    "peer-congestion-algorithm": "", 
    "peer-id-ttl-hours": 6, 
    "peer-limit-global": 240, 
    "peer-limit-per-torrent": 60, 
    "peer-port": 51413, 
    "peer-port-random-high": 65535, 
    "peer-port-random-low": 49152, 
    "peer-port-random-on-start": false, 
    "peer-socket-tos": "default", 
    "pex-enabled": true, 
    "port-forwarding-enabled": true, 
    "preallocation": 1, 
    "prefetch-enabled": 1, 
    "queue-stalled-enabled": true, 
    "queue-stalled-minutes": 30, 
    "ratio-limit": 1, 
    "ratio-limit-enabled": true, 
    "rename-partial-files": true, 
    "rpc-authentication-required": true, 
    "rpc-bind-address": "0.0.0.0", 
    "rpc-enabled": true, 
    "rpc-password": "{bfd6e82b06be1d08d7046c5c5313d3e7e7bfea7cierLMMFv", 
    "rpc-port": 8181, 
    "rpc-url": "/transmission/", 
    "rpc-username": "admin", 
    "rpc-whitelist": "*", 
    "rpc-whitelist-enabled": true, 
    "scrape-paused-torrents-enabled": true, 
    "script-torrent-done-enabled": false, 
    "script-torrent-done-filename": "", 
    "seed-queue-enabled": false, 
    "seed-queue-size": 10, 
    "speed-limit-down": 1600, 
    "speed-limit-down-enabled": true, 
    "speed-limit-up": 35, 
    "speed-limit-up-enabled": true, 
    "start-added-torrents": true, 
    "trash-original-torrent-files": false, 
    "umask": 18, 
    "upload-slots-per-torrent": 14, 
    "utp-enabled": true
}

Any idea's why Transmission does this?

I have version 3.00.5 installed.

Thanks in advance :)