Overflow blocking element when responsive

Firstly this is an incredible theme.

I”m using an image grid, and on the home page (only the home page) and when the page is responsive the element disappears. This issue occurs when the site is responsive (under 768px).

My image grid simply overflows which is due to javascript/jquery the theme is using. I’m using Portfolio Gallery image grid- https://wordpress.org/plugins/portfolio-gallery.

Here is my site:
http://www.terraceattic.com.au/

When I’m not on the home page, the issue doesn’t occur (such as here http://www.terraceattic.com.au/index.php/projects/).

I have inserted the short code directly in the php file and it works for other elements.

Thanks,