Hello Edwin,
Thanks for writing to us.
I checked your given site URL it seems that you have set the image in the section background. Please note if you set the image in the background then you will have set the custom height or you have set padding top and bottom in the VW unit to get the height.OR you can use our Image element and set the image. If you add the image through the Image element then you need to off the Globa Container.
You need to go to the section’s Row —>Layout —>uncheck the Global Container check box

I would suggest you go to your page and set the Page Template as Blank - No Container | Header, Footer and then check it again.

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Hope it helps
Thanks