5 star plugin; just having one issue

Thanks fellas for making this plugin available on the repository. It’s a breeze now to add the right watermark in the right position on photos.

I have a couple thousand pictures already uploaded on this one domain in particular that’s high traffic. Just experimenting with the plugin, new uploads work perfectly.

I’m using Easy Fancybox for a lightbox alternative. New uploads which show a watermark on the scaled picture and the full picture.

When watermarking images already uploaded to my media library, 40-50% of them “work” — work in the sense that although they don’t show a watermark on the scaled image, the watermark appears on the full image (when clicked).

Oddly, however, 50-60% of the images already in my media library just didn’t work at all — much like the previous plugin I tried.

Is there an explanation for this, or am I basically SOL on this one? Either way, thanks a bunch fellas — I wish I had known about this plugin a long time ago; it would have saved me hours of work!

https://www.ads-software.com/extend/plugins/image-watermark/