I'm running Deluge 1.1.0 on Vista Home Premium Edition.
On several occasions the torrent being downloaded has just disappeared from the list displayed in the main Deluge window and the related statistics ceased being displayed. In each instance my PC had been left unattended.
To resume I opened the Connection Manager window (Daemon was still running) and clicked the Connect button. The torrent once more appeared in the main Deluge window and the download resumed.
Torrent dropped when download incomplete
Re: Torrent dropped when download incomplete
it sounds like you're being disconnected from the daemon. is the daemon local or remote?