Angularjs cannot display hidden custom field

Any one is wiling to help on this?

I am trying to show two custom fields on app with angularjs, for normal custom fields, i can display by <span ng-bind-html="post.custom_fields.name"> but for hidden fields, like <span ng-bind-html="post.custom_fields._hidden"> it shows nothing.

on browser with “https://example.com/api/get_post/?id=123&custom_fields=_hidden”, i can see the custom field display correctly, but when in angularjs, just nothing.

Any idea?

https://www.ads-software.com/plugins/json-api/