When copying an existing Rapid Board in the latest release, the list of Swimlanes is reversed causing the system default of "Everything Else" to move to the top and all user-defined values to appear below. You cannot drag the user-defined values back above "Everything Else". This results in no swimlanes on the board because all issues are grouped into "Everything Else" since it's stuck as the first on the list. The only option is to delete all user-defined swimlanes and recreate them.