some images lost

Hi I am using the latest release version of the both the plugin and wordpress. However, auto-posted posts sometimes show the image ok but sometimes there is no image (there is the image place but empty) despite all posts have their images on “featured image” attribute.

here is the result: https://www.facebook.com/arti49com

thanks

https://www.ads-software.com/plugins/social-media-auto-publish/