We suggest making persistent the layout option "Group Multiplicities/Role names" when editing Class Diagrams (or, at least, use "true" as default value).
This setting is not persited in the layout file. See org.tzi.use.gui.views.diagrams.DiagramOptions and org.tzi.use.gui.views.diagrams.classdiagram.ClassDiagramOptions
We suggest making persistent the layout option "Group Multiplicities/Role names" when editing Class Diagrams (or, at least, use "true" as default value).