Products Category Page not displaying any additional products

Hi I have a strange issue…

The issue only occurs in Internet Explorer all other Browsers work fine. When adding an additional product then the products category page which I’ve created doesn’t show any products anymore.

In addition it doesn’t display the 4 columns which I’ve defined properly, meaning there are a few rows which only have 2 products and two empty “blocks” inbetween.

I am using the Canvas Theme from WooThemes.

Here’s the link:
https://www.kyburz-shop.ch/shop/ersatzteile/

Currently I’ve removed the additional Product so that it at least displays the products.

The shortcode I’ve used is the following:
[product_category category=”ersatzteile” per_page=”40″ columns=”4″ orderby=”price” order=”asc”]

Does anyone know why this happens only with IE?

Thanks,
Andrew

https://www.ads-software.com/plugins/woocommerce/