Bad performance

Hello WordPress-friends,

I’ve just noticed, that my loading-time for pages, where I’m using responsive lightbox, is horrible long.

When I deactivate the plugin, pages are running as usual. For example, without plugin https://www.promi-geburtstage.de/info/?id=2022_Richard-Gere is loading 7 sec. faster!!!

Is this a known problem?

Thanks in advance
Andreas

The page I need help with: [log in to see the link]