I am on JIRA Sofware, Scrum template, and have created a board of boards, using a filter query to display cards from all my other boards.
This works great for the board view, as I am using the same statuses across projects, and cards display where they should in their respective column. This means that the board is capable of understanding the concept of 'current sprint' and displays cards accordingly.
However it's a bit of a disaster in the 'backlog' view. Suddenly sprints don't quite seem to be pulled as intelligently. Even when the sprints have got exactly the same names, they are displayed as different sections, which means it is not possible to plan multiple projects across the same sprint/backlog view.
Is there a workaround?