Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanism.cs
===================================================================
diff -u -r421cbbc8a7149960b5e6908bde1744c63e4d1169 -r46bd119497bde576fd18d0b4f93961f2a7f84c34
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanism.cs	(.../PipingFailureMechanism.cs)	(revision 421cbbc8a7149960b5e6908bde1744c63e4d1169)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanism.cs	(.../PipingFailureMechanism.cs)	(revision 46bd119497bde576fd18d0b4f93961f2a7f84c34)
@@ -97,12 +97,14 @@
         {
             base.AddSection(section);
             sectionResults.Add(new PipingFailureMechanismSectionResult(section));
+            sectionResults.NotifyObservers();
         }
 
         public override void ClearAllSections()
         {
             base.ClearAllSections();
             sectionResults.Clear();
+            sectionResults.NotifyObservers();
         }
     }
 }
\ No newline at end of file