I’ve just tried pulling both URLs using curl -A Twitterbot and the first returns a page including cards tags, but the second does not.
I can see you’ve had a photo card whitelisted for the first URL, but I’m not sure why the card itself is not rendering. You might want to try getting the tags to render on the second URL (i.e. with a domain set rather than just the IP address), and then getting that URL whitelisted.