iOSFindBy & AndroidFindBy annotations are ignored

I've been trying for a couple of days to get iOSFindBy & AndroidFindBy annotations working with page objects and the PageFactory. I've tried versions 2.2.0 and 3.0.0 of the java-client and tests for Android and iOS, all with the same result - which is the same as not including any annotations.

Here is a truncated version of one of my page objects

public class HomePhonePage extends BaseHomePage {

    public HomePhonePage(AppiumDriver driver) {
        super(driver);

        PageFactory.initElements(new AppiumFieldDecorator(driver,
                        IMPLICIT_WAIT,
                        TimeUnit.SECONDS),
                this
        );
    }

    @iOSFindBy(accessibility = "home_landing_my_favorites_count_label")
    private WebElement myFavoritesCountLabel;

    public String getMyFavoritesCountLabel() {
        return myFavoritesCountLabel.getText();
    }
}

My test code:

    @Test
    public void testHomeIsValid() {

        homePhonePage = new HomePhonePage(driver);
        globalNavPage = new GlobalNavigationPage(driver);

        homePhonePage.clickHamburgerMenu(); //FAILS HERE because element was not found
        globalNavPage.clickHome();

    }

When I debug into PageFactory.initElements, I see [unknown locator] for each property that is a WebElement. Then the PageFactory defaults to looking for each page object's property name as the id or name of the WebElement and fails to find anything.

I suspect "I'm doing it wrong" but I can't figure out where. It is behaving as if the annotations are not even there.