loekazz

I had the same problem with the ‘lightbox plus’ plugin, so it wasn’t a plugin issue.

Problem solved now, changed Z-index of #branding in (child)theme css to a lower value, 8000 instead of 9999

/* =Header
———————————————– */

#branding {
/*border-top: 2px solid #bbb;*/
/*padding-bottom: 10px;*/
position: relative;
z-index: 8000;