Fuzzy images

Hi, am reposting this as no one seems to be able to offer any guidance. I have changed my image sizes, checked all setting are correct and turned off auto compressions. it only appears on this page that I am using elementor all other pages accurately reflect the images. can anyone help?

ORIGINAL POST HERE:

Hello,
When viewing the full width image at the top of the page in preview it looks great, but when I publish it is fuzzy.
I have tested out on other pages that at not created with Elementor and they look fine, its just the ones created with Elementor.
Any advise would be appreciated.
Cheers

The page I need help with: [log in to see the link]