Address 2 label missing for Australian billing and shipping

Here's a 'bug' I don't think many outside of Australia will have come across. In both billing and shipping the Address 2 field label is missing and the text field has shifted to the left. When I inspect the page I can see the Address 2 label is not there. I flushed all the caches to no avail and finally reinstalled 2.23, but the problem persists. I don't think it will break anything but it just looks ugly.

I think this may be the code responsible.

\profiles\commerce_kickstart\modules\contrib\addressfield\plugins\format\address.inc (line143)

// Country-specific customizations.
if (in_array($address['country'], array('AU', 'EE', 'LT', 'LV', 'NZ', 'RU'))) {
// These countries don't use the "Address 2" line.
// Leave it as a precaution, but hide the label to avoid confusing users.
$format['street_block']['thoroughfare']['#title'] = t('Address');
$format['street_block']['premise']['#title_display'] = 'invisible';
}

When I remove 'AU' the label returns and the field is justified. But I don't like hacking code so is there another way I can fix this?

Thanks.