site: http://vintagebeauty.hu/
X theme 5.2.2 with child theme
WordPress 4.8.2
cornerstone: 2.1.3
It happened two times yet (on another site: http://drvargazsombor-plasztika.hu/ ), that times I only canceled the footer as option on those pages. But now, it happened on the main page, and I need the footer on it.
On the editor view everything seems to be ok, but after saving I see this:

Why is it happening?
Now I canceled the footer on this page, because it looks like a mess like this… 