Parallax in scrolled popup with body overflow: hidden

[morawcik]

Hi.

Like in title - I have popup with Parallax plugin and when popup is opened then body has style overflow: hidden But it cause the problem: when I have cursor over Parallax then nothing is scrolling (popup or Parallax) because it takes behavior from body. But when I have cursor outside the Parallax then it works great.
Example is available at https://www.nyloncoffee.pl/identyfikacja-wizualna-corporate-indentity-dla-firmy-z-branzy-przemyslowej - it has already opened popup, first image is Parallax

PS Sorry for my english