looks like an issue with the Lazy Loader, on those problem pages i am not seeing a Logo just the placeholder for it which is also the problem with the sizing of the header
Check in the Lazy Loader settings if you can ‘exclude’ certain images from lazy loading. Most offer an option to exclude using a CSS class – for the logo you can use:
“Disable LazyLoad on an image
If you want to disable LazyLoad on a specific image, you can do so by adding the
data-no-lazy attribute to the img HTML tag:”