I’m seeing that when I added same image for post body, twitter or facebook, it creates three separate images. Could there be a regex to determine if same image (by the filename) being uploaded to reuse that image’s url? This increases space on, say AWS.
OR… upload the Twitter image card, view source code to see image URL then use markdown with the image url? Seems… geeky 
but not a way to go with this.
Happy to implement this with a PR if pointed in the right direction. Thanks