issues while sharing on facebook

HI,
I have been using this plugin for quite sometime and its just worked great.
lately since two three days, when i share any article from the blog
https://www.isparkmag.com on face book using the facebook share button, it displays a weird image and link but after sharing on fb the link does take me to the correct article. Something i’m unable to understand here. Could you please check.
Thanks.

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