Isolines - lack of datamapping after change of datamap component
test regular field -> isosurface -> isolines -> viewer 3D
In test regular field choose at least two components, one component for isosurface, the second component for isolines. Choose isolines component to be different from isosurface component, choose some isolines. In isolines in datamap choose Mapping component null. The isolines turn into grey color. Then again choose the previous mapping component. The isolines remain grey.