full width page: scroll appears

Hello to all
I’m recreating a site with the Customify + Elementor page builder (but the problem also exists in the catalog pages)

Basically if the page is opened to full screen no problem but if it reduces a little appears a white larval bar to the right of the heder and sidebar!

look:
https://s25.postimg.cc/tzdghvgq7/home.jpg