How are issues such as Initiatives, Epics or Stories ranked when your issues sources are comprised of multiple projects and boards?
For example, if I have issue sources including Scrum Board A (Filter = Project 1) and Scrum Board B (Filter = Project 2), where will the top ranked story from each backlog be displayed in the plan when the Story issue type filter is selected?
I'd imagine you would have to test this by creating a JIRA board including both projects in a filter and see how that compares to the Portfolio Plan.