Adding names to the whitelist does not except them

[msnackey]

Using the code suggestion from the documentation page, I tried adding a name ('Max') to the whitelist to prevent it from being deidentified:
deduce.lookup_structs['whitelist'].add_items_from_iterable(["Max"])

Unfortunately, this did not lead to the expected result of 'Max' still being represented in the deidentified text. I checked to make sure that adding it to the whitelist lookup structure did work, and indeed it was one of the items of the whitelist LookupSet. I also tried this with the placename Utrecht and had similar results. Maybe it is not intended to work with names but only (common) words?

Using deduce 3.0.3.