Extra bar of color that doesn't match with full page photo

Site URL: https://carnation-marlin-cj9t.squarespace.com/

The background color behind this image should match the background color of the rest of the page, but I keep seeing a white bar. Sometimes the bar shows up as a skinny line at the top of the image, sometimes at the bottom as a thicker line. I've changed the section height, overlay opacity, and theme color for this section and I can't seem to resolve it. I do have coding in there to create the parallax effect, but I don't see this issue anywhere else on the site. 

Hi. What is access password?

Hi there...it's FriendsofExuma2021

On 7/15/2021 at 7:24 PM, MMExuma said:

Hi there...it's FriendsofExuma2021

Hi. Looks fine here. Which screen size do you see problem?

My laptop, I think it's a 13" screen. It's not an abnormal screen size. 

12 hours ago, MMExuma said:

My laptop, I think it's a 13" screen. It's not an abnormal screen size. 

Hi. On which page? I see 1 turtule on homepage now..I don't see 2

On the homepage. I attached two more screenshots. I spoke with someone else at the organization yesterday and she saw the bar on her Macbook computer also. I've tried changing the background colors to see if I can resolve it, but nothing seems to work. It changes size and position when I refresh the page, sometimes it's above the turtle and sometimes below it. I only have one turtle on the page right now, but the bar never seems to go away. 

On 7/20/2021 at 8:36 PM, MMExuma said:

On the homepage. I attached two more screenshots. I spoke with someone else at the organization yesterday and she saw the bar on her Macbook computer also. I've tried changing the background colors to see if I can resolve it, but nothing seems to work. It changes size and position when I refresh the page, sometimes it's above the turtle and sometimes below it. I only have one turtle on the page right now, but the bar never seems to go away. 

Hi. Try adding this to Design > Custom CSS

.black .section-background-overlay {
    background-color: white !important;
}