Checked with curl:
curl -v -A Twitterbot "https://qa.sohomuse.com/joe-reckley/view/portfolio/ccNJPE7wuPbDk7QGH/HyEsey6Bu2fAgg7rg"
this return meta tags:
<meta property="twitter:card" content="summary">
<meta property="twitter:title" content="Zombi | SohoMuse - The Trusted Source">
<meta property="twitter:image" content="http://sohomuse-public.s3-website-us-east-1.amazonaws.com/short-url/dppNi">
in head.
Also checked availability of image with command:
curl -v -A Twitterbot "http://sohomuse-public.s3-website-us-east-1.amazonaws.com/short-url/dppNi"
it returns 301 redirect to AWS S3.