Since version 2.1, the answer object has a field called tags. However, sometimes, an empty array or even nothing is returned in this field:

Example with the filter !-*f(6t0Vk01e.

Am I doing something wrong or is this a bug?

Since version 2.1, the answer object has a field called tags. However, sometimes, an empty array or even nothing is returned in this field:

[Example with the filter !-*f(6t0Vk01e][1].

Am I doing something wrong or is this a bug?

[1]: https://api.stackexchange.com/docs/answers#order=desc&sort=activity&filter=!-*f(6t0Vk01e&site=stackoverflow&run=true