Scrolling Animation, browser scrollbar


i am trying to create a looping animation where clouds move across the screen, this works to a point - for some reason when the image reaches the edge of the browser, the browser horizontal scroll bar shows and I can scroll the page to the right which I don’t want to be able to do - this is despite having Overflow set to hidden.

Read Only site Webflow - Copy of Midnight Rebel Band



Here is my public share link: LINK
(how to access public share link)