Contributors macro: Content type not taken into account if filtering by space

Contributors Summary macro does not take into account the parameter Content Type if you have specified an space in the filter. Results for both pages and blogspots are displayed in the macro.

Repro steps:

1. In a page, add the Contributors Summary macro.
2. When configuring the macro, enter a space key in the field Space(s).
3. Select blogposts in the field Content Type.
4. Save and view the page.

Content from both blogspots and pages are taken into account in macro results.