External Distance Engine as "Milemaker" not able to provide distance if County Qualifier is missing

Summary:

We have a scenario to get the distance calculated from Milemaker. In most of the cases, we are getting the distance in OTM but there are a few cases where it's not working.

When the County Qualifier is not available at the location and the City name is "MECHANICSBURG". In the below screenshot, "CU" was just added for reference. If we remove the county qualifier then distance is not calculated.

Any suggestions on this

Distance Query Result

Content (please ensure you mask any confidential information):

External Distance Engine as "Milemaker" not able to provide distance if County Qualifier is missing