I have a Portfolio plan that is pulling in initiatives, milestones, epics, and stories from several boards. Whenever I try to exclude the issues without a parent (in the edit issue sources view), a handful of these issues without parents appear in the plan anyway! I've tried excluding these issues without a parent multiple times, but each time, a few random (out of hundreds) milestones, epics, and stories appear under the "Issues without parent" at the bottom of my scope view. Am I missing something? Is there a way to not include issues without parents at all?