Troublec with scrolling grid in responsive view

Hi

I have implemented sensation for my site and there is problem with grid module which displays articles and pictures. In PC once you click on any item in the grid module, pop up window can be scrolled and full content can be displayed. If it is done in responsive view on mobile, scroll is not working at all and window is cut.
See attached file one showing mobile view and one showing PC view with scroll.
Can this be adjusted?
Thanx
Emanuel

Live Url please

Hi

it is your template demo demo.joomlaplates.com/jp_sensation/
Click on any picture in grid module in PC and you can scroll. If you do this in mobile, it works sometimes once and than never ever and you see only content which fits screen.
Emanuel

Hello,
I cant see any problems with the lightbox on mobile phones

Which system do you use?