We use a US Dual Range Address locator (10.6 style release) and it does not return results for intersections with the numbered street typed first? We had the same behavior with a 10.5 style release.
If I search "west st and 8th st" it works fine. If I search "8th st and west st" it does not return any results.
This behavior is the same using the Find tool or the geocoding toolbar in ArcMap. Is this a known bug?