Create In-Place Mass copies and set parameters

Since mass revolve families don’t show handles for start and end angles, I use an In-Place Mass. But even the most simple cube mass created with Dynamo doesn’t display correctly. However, the properties show that the Height parameter is correct. What am I doing wrong here? I noticed that when a parameter is changed, the next Dynamo run uses the parameters of the last created instance…Maybe that gives a hint? If somebody wants to try things out, I attached the Revit and Dynamo files.testMassCopy.dyn (59.8 KB)
testInPlaceMassCube.rvt (1.4 MB)