Failed to parse to a known event - Direct Message

[BinaryHexer]

MessagePayload {  
  messageId = 0,
  messageType = "message",
  messageChannel = Id  {  
    _getId = "DXXX"
  },
  messageText = "someText"
}

Object (
fromList [ ("is_shared",Bool False)
               , ("channel", String "DXXX")
               , ("launchUri", String "slack://channel?id=DXXX&message=msgId&team=teamId")
               , ("imageUri", Null)
               , ("msg", String "timeStamp")
               , ("content", String "one two")
               , ("subtitle", String "userName")
               , ("event_ts", String "timeStamp")
               , ("title", String "TestGroup")
               , ("type", String "desktop_notification")
               , ("ssbFilename", String "knock_brush.mp3")
               , ("avatarImage", String "imageUrl")
              ])

Failed to parse to a known event
Please report this failure to the github issue tracker

So apparently it cannot handle Direct Message events?
Atleast it keeps reporting this in the output, has no problem sending messages to Direct Message channels.

[asayers]

This is a desktop_notification event. These are relatively new and slack-api doesn't understand them yet. We should fix this.