Yes, it coming from Easysocial because this page is under user profile page, but i realise this user profile unable to allow public user to access it so facebook unable to crawl the page so it will return your website data.

Do you know where I would replace that image in the screenshot to a different image?

I've manually add those opengraph tag into your login page -> /public_html/components/com_easysocial/themes/wireframe/login/default/default.php , you can modify your image link from this file.

By default code it will use this image logo now.
https://yoursite.com/images/hakisaki_logo_web_main.png

Great, thank you

You are most welcome, glad that your issues are resolved now.