I'm probably missing something very obivous but it seems like [`/users/{ids}/answers`](https://api.stackexchange.com/docs/answers-on-users) forgets to include the `tags` badge in the resulting [answer object](https://api.stackexchange.com/docs/types/answer):

> tags (2.1) an array of strings

Nowhere does this mention that it *may be absent*. So, I gather that it must be included with every query that I make to it. And yes, I'm using the appropriate filter.

Interesting behavior: Sometimes, I do see the item, but not always.

Here's a [demo](https://api.stackexchange.com/2.2/users/3980929/answers?site=stackoverflow&filter=!LUcFBIwWzWPWZPCMve40C.&pagesize=10&sort=votes). I read [somewhere](https://api.stackexchange.com/docs/absent-fields) that fields with *null* values are excluded, but I always understood that to mean fields marked with *may be absent* only.

So, is this a bug?