Smooth-Scroll does not apply on mobile

Hi

I have smooth-scroll activated and also applied this code to make it work for all internal links:

add_filter( 'generate_smooth_scroll_elements', function( $elements ) {
  $elements[] = 'a[href*="#"]';
  
  return $elements;
} );

But on mobile it's not working, as you can see on this page

Can you please check and help?

Thank you in advance and kind regards,
Sascha