Devon & Brian
There have been a few issues that have gone through Support related to this issue and perhaps you can reach out to Support to get attached to either of these
- BUG-000119849
- BUG-000111399
- BUG-000105332
The reason I suggested using Pro 2.3 to create the locator with the Create Locator tool using the StreetAddress role is because this tool creates new locators that do not exhibit the problem you are running into. They also provide valid house numbers for suggestions, improved intersection and reverse geocoding results. However, I don't believe Spillman can use the new locators directly yet, which is why I suggested adding them to a composite locator. If you do choose to go the route of creating the locators with the Create Locator tool in ArcGIS Pro 2.3 and add them to a composite locator, open the composite locator properties in ArcGIS Pro and uncheck the box 'Use Multithreading'.