Hello Siegmar Franke ,

Since The header image in theme is used as Background Image on fixed size, it is normal to show like this.
The header Height here Appearance => Customize => Header Options => Header Image used for all devices. If you want to decrease the height on the mobile, you can use following custom CSS:

@media only screen and (max-width: 767px){
	.inner-main-title {
            height: 200px;
        }
}

Best Regards!
Acme Themes

Can you please try the following custom CSS:

.wc-cat-feature .cat-details {
    display: none;
}

Best Regards!

Did you added this code on your .htaccess file.

# Allow access from all domains for webfonts.
# Alternatively you could only whitelist your
# subdomains like “subdomain.example.com”.


Header set Access-Control-Allow-Origin “*”

You can find similar query on searching Eample https://stackoverflow.com/questions/11616306/css-font-face-absolute-url-from-external-domain-fonts-not-loading-in-firefox

Best Regards!

Hello,

We dont have changes anything related to header image on last updates.

Please go to Appearance => Customize => Header Options and set the header Image. options

Best Regards!

Hello,

This should fix this issue

Graphics missing on some browsers

If this doesnot fix , we recommended you to contact hosting expert.

Thanks

Hello esquit,

It needs extensive time and also need customization of the theme.
We recommended you to hire developer for this or you can contact us for customization of the theme.

Best Regards!

Hello ,

If you can provide us your site url, we will observe and can provide you possible solutions.

Thanks

Hello shanson,

In you site, we found following console warning, which is preventing to load fonts:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://wp.alteca.com/wp-content/themes/medical-circle-pro/assets/library/Font-Awesome/fonts/fontawesome-webfont.woff2?v=4.7.0. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://wp.alteca.com/wp-content/themes/medical-circle-pro/assets/library/Font-Awesome/fonts/fontawesome-webfont.woff?v=4.7.0. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://wp.alteca.com/wp-content/themes/medical-circle-pro/assets/library/Font-Awesome/fonts/fontawesome-webfont.ttf?v=4.7.0. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

That is actually server issue.
We wonder if you have just migrate the site from wp.alteca.com

We have collected some information for you
http://stackoverflow.com/questions/26125030/font-awesome-icons-not-showing-in-chrome-a-maxcdn-related-cross-origin-resource
https://www.prestashop.com/forums/topic/345555-solved-glyphicons-font-awesome-not-correctly-displayed-in-firefox/

We hope it will help you.

Best Regards,
AcmeThemes