Filtering by Epic

[james.foley]

I have created a new project board, comprising around 10 epics. These Epics all appear on the roadmap, and were created by selecting the + button from the Roadmap page so I know they are epics and really do exist. They have names such as "Epic 1", "Epic 2" etc.

Under each epic I have a large number of user stories, and under these several tasks.

I now wish to filter my issues list so that I can see all issues (stories, tasks, sub-tasks) for each Epic. However, when I try to filter on the name of the Epic is says it doesn't exist. I've tried using the name of the Epic, and/or the Issue ID and in both cases it says that it doesn't exist and I can't filter.

I become even more baffled, since when I export ALL FIELDS to CSV, the Epic name for all these issues is again blank. Yet they're clearly not blank as they all appear on the Roadmap screen.

I can filter on Parent where the Parent ID is the ID of the Epic. However, this only gives me the stories that roll up to this Epic ID, and not the tasks or sub-tasks.

What am I doing wrong?  I've searched the board and can't find an adequate solution to this, so would appreciate any guidance. Thanks in advance.