random python state saving error

not always but ever so often pv.SplitViewTrace state fails as follows:

vtkSMTestDriver: client successfully started.
Playing: /home/utkarsh/Kitware/ParaView3/ParaView/Applications/ParaView/Testing/XML/SplitViewTrace.xml
(   7.284s) [paraview        ]         vtkSMTrace.cxx:133   WARN| Failed to generate state.
vtkSMTestDriver: ***** Test will fail, because the string: "Failed"
vtkSMTestDriver: ***** was found in the following output from the client:
"(   7.284s) [paraview        ]         vtkSMTrace.cxx:133   WARN| Failed to generate state."
Traceback (most recent call last):
  File "/home/utkarsh/Kitware/ParaView3/ParaViewBin-Qt5/lib/python3.6/site-packages/paraview/smtrace.py", line 162, in get_accessor
    return cls.__REGISTERED_ACCESSORS[obj]
KeyError: <paraview.servermanager.GridAxes3DActor object at 0x7f54736684a8>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/utkarsh/Kitware/ParaView3/ParaViewBin-Qt5/lib/python3.6/site-packages/paraview/smstate.py", line 157, in get_state
    traceitem.finalize()
  File "/home/utkarsh/Kitware/ParaView3/ParaViewBin-Qt5/lib/python3.6/site-packages/paraview/smtrace.py", line 1128, in finalize
    trace.append(accessor.trace_ctor("CreateView", filter, ctor_args))
  File "/home/utkarsh/Kitware/ParaView3/ParaViewBin-Qt5/lib/python3.6/site-packages/paraview/smtrace.py", line 535, in trace_ctor
    paccessor = Trace.get_accessor(prop.get_property_value())
  File "/home/utkarsh/Kitware/ParaView3/ParaViewBin-Qt5/lib/python3.6/site-packages/paraview/smtrace.py", line 171, in get_accessor
    "it. Skipping this action." % repr(obj))
paraview.smtrace.Untraceable: "<paraview.servermanager.GridAxes3DActor object at 0x7f54736684a8> is not 'known' at this point. Hence, we cannot trace it. Skipping this action."
Empty state generated.