Activity -> Queue Entries cannot be removed (Torrent Blackhole)

Help & Support
1

I have a bunch of entries in Activity -> Queue that have already been imported into Sonarr.
The Download Client is a Torrent Blackhole and the blackhole folder is currently empty.

Any attempt to remove the Queue entry give the following error

Message
Request Failed: Cannot remove DownloadItem Blackhole_The Simpsons Season 14_635673258361494683 because it was not found.

Exception
System.ArgumentException: Cannot remove DownloadItem Blackhole_The Simpsons Season 14_635673258361494683 because it was not found.
at NzbDrone.Core.Download.Clients.TorrentBlackhole.TorrentBlackhole.RemoveItem(String downloadId, Boolean deleteData) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\TorrentBlackhole\TorrentBlackhole.cs:line 128
at NzbDrone.Api.Queue.QueueActionModule.Remove(Int32 id) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Api\Queue\QueueActionModule.cs:line 72
at NzbDrone.Api.Queue.QueueActionModule.<.ctor>b__3(Object x) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Api\Queue\QueueActionModule.cs:line 39
at CallSite.Target(Closure , CallSite , Func`2 , Object )
at Nancy.Routing.Route.<>c__DisplayClass4.b__3(Object parameters, CancellationToken context)

2

Both the watch folder and the torrent folder for the blackhole client are empty?

Please hastebin a couple minutes of trace logs so we can see where its pulling these from.