Issue Summary

The Epic Swimlane feature in Jira is not functioning as expected. It should group issues based on their Epic. However, it is currently grouping by hierarchy level, specifically any Issue type with a hierarchy level above 1, that has a child issue and does not have a parent issue. This behavior deviates from the expected grouping strictly by Epics and causes confusion and potential mismanagement of issues.

Steps to Reproduce

Step 1: Go to the issue hierarchy settings in Jira and add more levels to the issue hierarchy.
Step 2: In the issue hierarchy settings, associate a specific issue type with the new level you've created in the hierarchy.
Step 3: Navigate to your project settings and associate the new issue type to your project.
Step 4: Go to the board settings and configure the board to display Swimlane by epic.
Step 5: Create a new issue and use the issue type created (that is above epic in the hierarchy).
Step 6: Associate a child issue with it.

Expected Results

The Swimlane by Epic should be grouped only by epics.

Actual Results

Instead of grouping only by Epics, the Swimlane by Epic is grouping by every issue that is level 1 or above in the hierarchy. 

Workaround

Currently there is no known workaround for this behavior.