Shortcode display – woocommerce tabs

Hi,

if you look at the page, there is custom tab “Trené?i” – if you click on it for the first time, there is only H2 heading. Now you click on another tab and then again on “Trené?i” – now there are team members in grid…

Where is the problem? I tried a few plugins for custom tabs, the behaviour is always the same. How to force it to load at the first time displaing the tab content?

The page I need help with: [log in to see the link]