Hi hilkes,

I have tried a code to give you the idea if that works for you, please check this video:

https://d.pr/v/kokM5L

If this is the solution you want, then add the following code in Theme Options > Other Settings > Custom JavaScript > Footer JavaScript:

<script>
jQuery( document ).ready( function() {
    Kalium.Hooks.addFilter( 'ScrollToElement.scrollTo.offset', function( offset ) {
        return offset - Kalium.Header.Sticky.getStickyHeight();
    } );
} );
</script>