Buttons are not displayed well

Hi,

I had created a post some time ago because I had a problem with buttons that showed up badly and you solved it. Link : https://wordpress.org/support/topic/buttons-are-not-displayed-well-in-front-since-the-last-update/

I’ve the same issue now on other pages “/evenements/” and under pages.

Can you resolve it ?

Thanks in advance.

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