diff --git a/ChangeLog.txt b/ChangeLog.txt
index 3c47fef02..64a5ddd50 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -2,6 +2,7 @@
 - Placeholder %size% has incorrect value.
 - Values for waist and hip swapped for individual measurements. 
 - Fix crash when edit a group operation notes.
+- Fix bug. Undo Union details hide piece node points.
 
 # Version 0.7.43 Jan 31, 2021
 - Improve Windows installer. Avoid crashing on checking if a program is still running.
diff --git a/src/libs/vtools/tools/vtoolseamallowance.cpp b/src/libs/vtools/tools/vtoolseamallowance.cpp
index d77503abc..17edc5eae 100644
--- a/src/libs/vtools/tools/vtoolseamallowance.cpp
+++ b/src/libs/vtools/tools/vtoolseamallowance.cpp
@@ -2021,7 +2021,7 @@ quint32 VToolSeamAllowance::DuplicateNode(const VPieceNode &node, const VToolSea
     {
         case (Tool::NodePoint):
         {
-            const QSharedPointer<VPointF> point = qSharedPointerDynamicCast<VPointF>(gobj);
+            auto point = QSharedPointer<VPointF>(new VPointF(*qSharedPointerDynamicCast<VPointF>(gobj).data()));
             initNodeData.id = VAbstractTool::CreateNodePoint(initData.data, gobj->getIdObject(), point);
             VNodePoint::Create(initNodeData);
             break;