wordpress-multisite-enhancements
                                
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                        Misplaced icon when long site name

When a site is not public and site name is as long as the width of the menu items, the list of sites in the My Sites submenu is placed before the next site instead of the site in question. May result in wrong indication or double icons.
via https://wordpress.org/support/topic/misplaced-icon-when-long-site-name/
The current test has no problems.

All I can say is that if I remove #wpadminbar > #wp-toolbar > #wp-admin-bar-root-default .ab-icon { float: left; } found
in admin-bar.css the icons align on the line it belongs, left of the label.