[Plugin: WP Photo Album Plus] Lightbox

Which lightbox do you use? And a link please.

I tried Lightbox Plus.
Here’s wppa+: https://www.musikhuset.org/sliperiet/ny/?page_id=449

If you activated Ajax on Table IV-A1, the lightbox needs refreshment after a page change (ajax action). This is automaticly done for Lightbox 3 (that seems no longer available) and for the embedded lightbox.

Either uncheck IV-A1 or (better): Set lightbox keyword to wppa (Table IX-A6); no lightbox plugin required and the other lightbox settings will apply.