Horizontal overflow with my theme, can’t find the source

Hello,

I’ve been living with this slight issue that I’d really like to solve:

there’s a right overflow on my website (that doesn’t even appear consistently) that I can’t find the source of for the life of me.

The only way I’ve found is to remove everything from the homepage, which makes me think there must be some kind of conflict between PageBuilder and my theme.

Until now I’ve been using overflow-x:hidden, but this doesn’t solve the issue on mobile, where swiping moves the entire page to a certain degree of frustration, so I’ve removed it in order to show you better.

Thanks in advance to anyone who might be willing to help.

http://www.ristorantequattromani.com