Jetpack Publicizes Logo rather than Image on Facebook

Hi there,

Experiencing some strange behaviour here. Posts on website from iPhone WordPress app display logo and not image.

After posting using WordPress Mobile app (quick post image or post then add image), the post is published to Facebook but only the logo is displayed – the strange behaviour part is that it worked for the first post (after I deleted and re-enabled connection to Facebook) and then all subsequent posts display the logo on Facebook.

Posting from WP admin page posts correctly. For examples, please see:
https://www.facebook.com/bouncybuddies.ch
https://www.bouncybuddies.ch/gallery/

Any ideas or suggestions?

Many thanks,

Philippe