Hi, I've come across a bug, probably related to another post on this forum.
I've created a Kanban board based on a saved filter for issues from multiple projects:
assignee = currentUser() and issuetype != Epic and status != Done order by Rank
However, I'm getting this for an issue from one of the projects:

The board is supposed to group by Epics. However, it sorts some of the issues under "Issues without epic". But the issue in that group is itself an epic.
Obviously, when adding more epics, their issues will now be lumped together under "issues without epic".
In the other post I mentioned earlier someone asks to investigate the "issue hierarchy". However, in my project there seems not to be a section "issue hierarchy". Not sure either what I could "fix" there ... ?
Any pointers or workarounds would be greatly appreciated!