Limit width for wide screens: no ion-popover visible anymore

Hey, I want to limit the width of my site for wide and ultra wide screens and it’s working with:

@media (min-width: 1280px) {
      ion-app {
        width: 1280px;
        margin: auto;
        position: absolute;

in the global.scss

It’s working so far, but normally I’ve an ion-popover for a menu:

But now it’s not showing anymore (only the shadowing for it):

Can i get it back somehow?