Yoast SEO: Social settings don't work in like button

WordPress version: 4.3.1
WordPress SEO version: 2.3.5

The page is on http://www.deluifelbaanleiden.nl/krasenwin

I did this:
Added a default like button the page and set the Yoast SEO Social settings of the page.

I expected the plugin to do this:
To show the title, description and image I filled in on the page in wordpress.

Instead it did this:
It gives me a piece of text from the page as description and a random picture.
The meta tags are set correctly when I check the source code.

Thanks in advance!