This has never happened to me before and I have no idea what to look for or where. I believe it is either an underscore theme problem or a WordPress one, can you please guide me if it has happened to you before?
I have developed themes before but this has never happened to me. I am attaching a picture so you can check it out.
It is not an overflow issue because there are no elements that can do this to the theme. It is like there are not even elements there, just blank space.