Also confirming, putting in the NAS IP address into those fields started my dead torrents after a tracker update.
Many thanks for the tip and the solution guys!

Hello, I'm seeing the same thing, since the latest 2.1.1-17 on DSM6. My issue is more severe as this comes after Deluge is running for about a day, then ALL torrents have this problem, and no new downloads start. Then I restart the Deluge process from the DSM WebGUI and everything is OK again, for a...