Problems copying and pasting slides

Hello,

I’m having some problems with the slider component. This is a paid template with an included slider that works OK with the 2 included slides. I tried to copy/paste the slides to add another 2 slides into the slider. The code structure seems ok and the slider settings also seem fine, but I cannot “see” the 2 new slides when previewing the work or after publishing. All slides are visible within the designer screen.

Has anyone any ideas how to fix this?
See link below, the issue is the slider on the home page - thanks

Thanks,
Phil


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