Badge Review Pop-up window not visible

I use Neve Theme with Elementor. The Reviews are not visible in the Pop-up window of a badge, but they are present in html code. 

I suppose it's a layout issue. I was able to fix it with custom css as following:

.wprs_unslider-fade .wprs_unslider-wrap li {
position:relative;
left: 0;
top: 0;
right: 0;
z-index: 8;
list-style-type:none
}