Hi Ariba,
This is not a solution. The site blokhuiswinterberg.nl became very slow after the update, all content has shifted, especially on pages that were not made with Pagebuilder, the normal Joomla pages. Pop-up items no longer work. Font awseome icons are no longer shown. Plus that on a mobile and ipad pro the menu and the hamburger menu don't look right. There was no other solution than to restore the backup and not do a Helix ultimate update.
Site town stadhuisjeapeldoorn.nl, here too the solution offered does not offer a solution. Also on this site all content has shifted, this can be solved with css, but not ideal. Also here the font awsome icons are not shown. On an ipad pro, in vertical position, the hamburger menu is not shown, but the normal menu through the images. If this happened with previous updates I changed the menu.php file in features, then I changed the -lg option to xl and it worked perfectly, but that doesn't help anymore either. On mobile the off canvas menu no longer works. I hope that the site stadhuisjeapeldoorn will find a solution for the above issues, otherwise there is no other option than to restore the backup.
Overall: not happy with these developments. I have more sites with Helixultimate and these cannot be updated now, too risky.