nax library saveAsLayerFile creates an output layer file (.lyr) with no labelling

[SOTIRIOSTRIANTOS]

When trying to save as layer file (.lyr) an arcpy.nax.VehicleRoutingProblemResult or an arcpy.nax.RouteResult object  the symbols are black without labels.

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This doesn't occur when saving in lpkx format. Which i have to mention throws a runtime error when calling  saveAsLayerFile if the results object workspace was "in_memory".

saveAsLayerFile3.PNG

Any ideas?