Currently, webhooks only send the thumbnail image for media in the “play” or “rate” events, and not on “scrobbles.” There are many use cases where the thumbnail is nice to have that depend on scrobbles, and the current implementation complicates matters, forcing developers to watch for additional events and temporarily cache thumbnail images. Your own Slack example project has to do this, and would be simplified (and improved, really!) by adding the thumbnail to the scrobble event.
Please please add the thumbnail to the scrobble event!
