In my app I have the following UI structure:

        Group rotatedRoot = GroupBuilder.create()
                .children(StackPaneBuilder.create()
                    .children(ScrollPaneBuilder.create()
                        .content(lines)
                        .build())
                    .rotate(-90)
                    .build()
                )
                .rotate(90)
                .build();

Both rotates are necessary however their combination results in invalid layout behavior. Try to drag the scrollbar. The whole ScrollPane with its scrollbar moves around.