Problems in the intranet with ie

Hey everybody

Really strange thing happen:

To see this issue just this simple code


public class MyApplication extends Application {
    
    @Override
    public void init() {
        Window window = new Window("MyApplication");
        setMainWindow(window);
        window.setTheme("test");
        VerticalLayout layout = (VerticalLayout) window.getContent();
        layout.setMargin(false);
        
        Panel header = new Panel();
        header.addStyleName("header");
        header.setHeight("70px");
        Label salutation = new Label("Welcome");
        header.addComponent(salutation);
        window.addComponent(header);
        
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 100; i++) {
            sb.append("test\n");
        }
        Label label = new Label(sb.toString());
        label.setContentMode(Label.CONTENT_PREFORMATTED);
        label.setWidth("100px");
        label.setHeight("1000px");
        window.addComponent(label);
    }
}

And this css File


@import "../reindeer/styles.css";

.v-panel-header {
    position: fixed;
    z-index: 5;
}

Works fine for any browser.
But if we in the intranet - to test it just add the entry 127.0.0.1 application to the hosts file and start with http://application… - the ie browser hides the header panel

Can’t we use the tag fixed?

greetings