Missing order tokens in email actions

the token in messages for customer first/last name are missing / not replaced.
the email messages say "Hello [order-first-name] [order-last-name]"

These token are not in the token list on the email action setting page for roles (though they correctly appear in order related messages)

I noticed in uc_roles.ca.inc:

function uc_roles_action_order_email_form($form_state, $settings = array()) {
  return ca_build_email_form($form_state, $settings, array('global', 'uc_roles', 'user'));
}

'order' is apparently missing in the token flter argument, or the 'user' category does not include order user token when it should.

Is this a bug, or something odd happening somewhere else?

Thanks