[Plugin: NextGEN Gallery] Reloading whole page

i am having the same issue

You can solve your problem only if you contact the Author of the plugin. Hope they may help you!

Thanks

as long as this issue exists, can you recommend any other picture plugin, which opens pictures in this “popup”?

Yes, there is a plugin similar to NextGen Gallery. The name of the plugin is SlideShow Gallery which you can download from here.

Thanks