update 3.3.0 breaks get_the_archive_title()

Hi, the last update breaks the get_the_archive_title() function with the filter applied in co-authors-plus.php:133. I think the error is in the function filter_author_archive_title() (co-authors-plus.php:1621) that return nothing if archive type is not an author (in my case a tag).

I would greatly appreciate a fix in the next release ??