Discarding an item while queued can have you end up like this:
It basically occurs when you drag an item and is holding it or releasing it exactly when the teleport happens.
It would be nice if you could make the game terminate or log out if the map is patched and the "server is not responding" timer goes up to 60-100
EDIT: funny enough you can discard the item even after it automatically logs you out after 15 minutes for inactivity. Nothing happens in game though.