Elements sometimes not showing up on published site

Hi All,

I am having a weird situation. The parallax gallery on the homepage is not always showing up on published site in webflow.io and other hosting service but it works fine on preview. This happens on a larger screen size. The weird thing is the images reappeared once I adjusted the browser window size to smaller and back to large size as I demonstrated in the video I attached. Is there any way I could fix this? Thanks.

Screen capture:

Here is my public share link: Webflow - Kiki