We suggest the implementation of an option to hide the "Everything Else" swimlane.

Context:

A Kanban board contains "Story" and "Sub-tasks" in its filter and is set to display stories as swimlanes. The stories that contain sub-tasks become swimlanes as expected, however, the ones that don't (or that contain only old hidden completed subtasks) will all show on a swimlane named "Everything else" at the bottom of the board.

Removing "Story" from the board's filter while keeping "Sub-tasks" will prevent the board from displaying the "Everything else" swimlane, however, the filter won't have the visibility of the parent Epic of the story, and consequently, the Epic labels on the Stories won't be displayed.

Keeping "Story" on the filter to maintain the Epic labels is necessary in this case, but the the "Everything else" swimlane is undesirable. It can be removed by applying a quick filter on top of the board, however we suggest that a dedicated option to hide the "Everything else" swimlane be implemented on the board's settings, along with the "Expand/Collapse all swimlanes" options.