Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Read/AssessmentSectionEntityReadExtensions.cs
===================================================================
diff -u -r4af9b44a7b9bea4035396ef522fe83c4cdd6f398 -r4e9e82bbdd11d6aa416985f6e1c6150d1228f454
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Read/AssessmentSectionEntityReadExtensions.cs	(.../AssessmentSectionEntityReadExtensions.cs)	(revision 4af9b44a7b9bea4035396ef522fe83c4cdd6f398)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Read/AssessmentSectionEntityReadExtensions.cs	(.../AssessmentSectionEntityReadExtensions.cs)	(revision 4e9e82bbdd11d6aa416985f6e1c6150d1228f454)
@@ -25,6 +25,7 @@
 using Application.Ringtoets.Storage.Serializers;
 using Core.Common.Base.Geometry;
 using Ringtoets.Common.Data.AssessmentSection;
+using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.Integration.Data;
 
@@ -67,6 +68,8 @@
             entity.ReadHydraulicDatabase(assessmentSection, collector);
             entity.ReadReferenceLine(assessmentSection);
 
+            FixMemoryLoadProblemForReadingFailureMechanisms();
+
             entity.ReadPipingFailureMechanism(assessmentSection, collector);
             entity.ReadGrassCoverErosionInwardsFailureMechanism(assessmentSection, collector);
             entity.ReadHeightStructuresFailureMechanism(assessmentSection, collector);
@@ -89,6 +92,18 @@
             return assessmentSection;
         }
 
+        /// <summary>
+        /// This method should be called after reading the <see cref="ReferenceLine"/> but
+        /// before reading any of the <see cref="IFailureMechanism"/> instances.
+        /// </summary>
+        private static void FixMemoryLoadProblemForReadingFailureMechanisms()
+        {
+            // See WTI-1049
+            GC.Collect();
+            GC.WaitForPendingFinalizers();
+            GC.Collect();
+        }
+
         private static void ReadReferenceLine(this AssessmentSectionEntity entity, IAssessmentSection assessmentSection)
         {
             if (entity.ReferenceLinePointXml != null)