Soft credit report results not added to group

In the Donor Report (Detail), it's possible to include contacts with both Contributions and Soft Credits in the report results. If you then select the action to "Add Contacts to Group" only the contacts who are included in the report results because of a hard-credited contribution will be added to the group. Contacts who are included in the report results because of a soft-credited contribution will not be added to the group.