Issue with attachment detail

Hello

I have a problem with my site. I copied several images from my old site.

for some weird reason, all the images that where uploaded (on the old website) before the year 2012 won’t show in the preview, but they normally appear if i insert them into an article.

Those are my screenshots to better understand the problem:

https://i61.tinypic.com/somvl0.jpg -> Preview Media library
https://i59.tinypic.com/9bkl12.jpg -> Highlighted image into the article

How can i fix it?

Thanks