Why does a solid white bar appear on my website pages?

[Adaks]

Hey, I don't know how to remove these white bars, it wasn't there before but now happens on my two pages.

Contact – TECHHIVE

Password: adaks

The thing is, these bars don't appear when I'm editing my store, but on the real website preview it does happen

EDIT: IT seems as though as the page size increases, the white bar disappears, and when the page gets smaller than the bar disappears. HELP

[ZestardTech]

Hello there,

Working fine!