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Images shrink in grid when publishing

Hi everyone!
I’ve been struggling with a problem that the images in the grid on work page get shrinking when publishing.
I’ve tried to set the width and height of 100% and, set max height 1200px but nothing worked.

Here I attach the read-only link

Thank you in advanced.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

Please share the URL to the published page since that is where your issue is visible.

Is this one correct?