vtkResliceImageViewer does not show cursors since VTK 9.1.0
Since VTK 9.1.0, the cursors of the vtkResliceImageViewer are not properly visible anymore. Sometimes some dots or line segments are shown though.
I tried the FourPaneViewer example as well as the corresponding tests (TestResliceCursorWidget2.cxx, ...).
The cursors are visible when using VTK 9.0.0.