Resize logo at on the top of the page after jumping to an anchor

Hi,
Thanks for your question and the link to your site, for your logo this css should help:

@media only screen and (min-width: 768px) {
.av_header_transparency #header_main svg {
    height: 200px !important;
    max-height: 200px !important;
}
}

but I notice that your main menu height is also not correct, perhaps you have tried to change the header height with some custom css instead of using the theme options at Enfold Theme Options ▸ Header ▸ Header Layout ▸ Header Size?
Perhaps it would be better to remove your custom css and try the theme option.
As for your main menu links, it seems like your page is reloading instead of jumping down to the anchor, in your menu items did you place the whole url, try just using the anchor ID.
If this doesn’t help please include an admin login in the Private Content area so we can be of more assistance.

Best regards,
Mike

Hi,
Thank you for your patience, I found that the two sub-menu items #einfamilienhaeuser & #wohnanlage are triggering as the active menu item when the #informationen section is in view, I created a test menu without these two items and the menu works correctly, please try enabling the test menu to test.
I checked your page but couldn’t find duplicates for #einfamilienhaeuser & #wohnanlage, so I’m not sure what could be causing this.
You could try this javascript solution to correct the highlighting based on the scroll, try adding this code to the end of your child theme functions.php file in Appearance ▸ Editor:

function custom_script() { ?>
  <script>
(function ($) { 
	setTimeout(function(){
	$("#menu-item-762").removeClass('current-menu-item');
	},300);
  $(window).scroll(function() {    
      var scroll = $(window).scrollTop();
      if (scroll > 500) {
          $("#menu-item-783").addClass('current-menu-item');
      } else {}
      if (scroll < 1400) {
          $("#menu-item-762").removeClass('current-menu-item');
      } else {}
      if (scroll > 1400) {
          $("#menu-item-783").removeClass('current-menu-item');
      } else {}
  });
})(jQuery);
</script>
  <?php
}
add_action('wp_footer', 'custom_script');

and see if this helps

Best regards,
Mike