Missing house numbers after TIGER import on local Nominatim instance

I've had a look through some of the existing questions on this, and I can't quite find anything that matches.

I'm running a local instance of Nominatim 3.4.1 and the results that I'm getting are missing the house numbers, despite having imported the TIGER data.

The test case that I'm using is "2037 Goldfield Ln", which should return an address in Sonoma County, California.

As per the CentOS instructions I downloaded, extracted and then loaded the TIGER data as follows:

./utils/setup.php --import-tiger-data ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions

Before running the second command, I verified that CONST_Use_US_Tiger_Data (sorry, the underscores are messing with the formatting) was set in ./settings/local.php within my build directory.

However when I search using my test case, the house number is not being returned from my local instance.

Does anyone have any suggestions as to what might be going wrong, or if there's some step that I've missed?