I know it's of very little help, but I have not seen this issue, and I've been using Deluge for years (not automated via the arr suite, however)
It would do you well to find out what error it is throwing (check logs). Would be much easier to diagnose if you knew the actual issue.
You can say that speaks volumes about the character of the author (though you are the one assigning said "shame"). You were asking why this report deserves credence. The points raised in the report have citations such that you can decide where you fall on the presented issues.