I understand that this is supposed to be accomplished by editing the filter for the parent board, however when I edit an existing filter to include an additional project, that project's issues are not appearing in my board, yet they do appear in the filter itself.
My process for replicating this is the following:
- Create new board, and during the creation, configure it to reference 2 different projects.
- The new board will show issues from both those projects, as expected.
- Go to Configure Board and edit the filter query to include a 3rd project.
- Save query.
- Refresh board to see no issues from the 3rd project.
There must be some additional step required for a project to appear in a board, on top of it being included in the filter.