https://support.esri.com/de-de/bug/address-locators-using-the-single-house-subaddress-styl-bug-000085120
BUG-000085120 for ArcGIS for Desktop
Address locators using the Single House Subaddress style do not provide a 100 match score when searching for addresses with a forward slash in the SubAddr Unit...
bugarcgisdesktop