I am using WordPress Twenty Seventeen for my website and I am having an issue with my header image on mobile. When I go to start scrolling, the header image kinda zooms-in, I have tried to google this issue but came up with nothing, I've tried going through the CSS code and don't see any transitions or the elements changing when I inspect them, Here is an example site:
The header image is shorta zooms in when you start scrolling, is there away to prevent this so it stays the same size before scroll?