author_picture twig variable outputting title and bio? Reading the D8 documentation, it says the appropriate twig for displaying the author's picture is:

{{author_picture}}

When I use that, however, I'm getting the author's title, and description as well.  Is there a way to fix that other than CSS fixes to render the other fields invisible?  Or is there something I'm missing?
According to the documentation, {{author_picture}} is showing the node author user entity, rendered using the "compact" view mode.

In other words, you can adapt it by browsing to http://your_site/admin/config/people/accounts/display/compact