Images jumping to upper left

I’m not sure if adding “lightbox” to the plugin’s rel attribute caused this or not but, I’m noticing the images jump to the upper left corner on mouseover.

I have no idea why its happening or how to keep the images from moving but it would be great if you could help fix it.

I’ll see if I can find any help via google.

Thanks!

https://www.ads-software.com/extend/plugins/responsive-gallery-grid/