Problem with Featured Images in Social Media

Hi! I bought SuperMag Pro Theme two years ago and, due to a problem with my hosting and my backup, I was forced recently to build the website all over again, just copying all things right from the older website.

The thing is, there is a problem with Featured Images that didn’t happen previously. The picture I chose as Featured Imaged, always was shown up when I shared the link in Social Media. That’s very important, cause I always adapt each Featured Image for the previsualization in Social Media. But now, when I share the link social media, the picture that shows up is the one I insert in the text box (with no cropped at all) and several images that have nothing to do with the particular post. How I can solve this?

I think is just a matter of configuration, cause this has not happened to me before and I didn’t use any plugin for this previsualization in social media.

I will be very grateful with any help. Thanks in advanced.