Seems that way, yes. Though I don’t remember if back then I extensively tested our application with a VTK version with that MR applied; I just put the workaround in there (as we typically use release versions of VTK, and there wasn’t one yet with the MR applied), with a preprocessor check for more recent VTK versions; so now when I tested with vtk master where the preprocessor check disabled the workaround, it popped up.
If I find the time I’ll do that, thanks for the hint!