Index: Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Plugin/StabilityStoneCoverPlugin.cs
===================================================================
diff -u -r6187a30d4f2bd03190fd8cd7aefecf4bd14317e5 -rbb7d45597fde9aa9066da6454e833aebbea32908
--- Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Plugin/StabilityStoneCoverPlugin.cs	(.../StabilityStoneCoverPlugin.cs)	(revision 6187a30d4f2bd03190fd8cd7aefecf4bd14317e5)
+++ Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Plugin/StabilityStoneCoverPlugin.cs	(.../StabilityStoneCoverPlugin.cs)	(revision bb7d45597fde9aa9066da6454e833aebbea32908)
@@ -69,7 +69,7 @@
             {
                 CreateInstance = context => new StabilityStoneCoverWaveConditionsInputContextProperties(
                     context,
-                    context.AssessmentSection.GetNormativeAssessmentLevel(context.Calculation.InputParameters.HydraulicBoundaryLocation),
+                    () => context.AssessmentSection.GetNormativeAssessmentLevel(context.Calculation.InputParameters.HydraulicBoundaryLocation),
                     new ObservablePropertyChangeHandler(context.Calculation, context.WrappedData))
             };
         }