SiteOrigin tabs

Hi,

There is something wrong with the tabs widget on my website.
Indeed, as you can see, there is a kind of overflow that overlaps the content below.

What is weird is that it only occurs to the first default open tab and if I click on another one and then come back to the first one, the problem disappears.

It looks like it just doesn’t load well when the page is loading.

Do you have any idea ?

Thank you.

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