Index: sources/gui/qml/pages/pretreatment/PreTreatmentInstallStack.qml
===================================================================
diff -u -r0975a67dd4e4673b9a7b226bfea02cbfa489c418 -r07121b02499a4c929c5b5e8bd804a67539574c1b
--- sources/gui/qml/pages/pretreatment/PreTreatmentInstallStack.qml	(.../PreTreatmentInstallStack.qml)	(revision 0975a67dd4e4673b9a7b226bfea02cbfa489c418)
+++ sources/gui/qml/pages/pretreatment/PreTreatmentInstallStack.qml	(.../PreTreatmentInstallStack.qml)	(revision 07121b02499a4c929c5b5e8bd804a67539574c1b)
@@ -28,8 +28,13 @@
         if (visible) {
             _headerBar.activeStack = stackView
         }
+        else {
+            stackView.initialItem = null
+        }
     }
 
+    stackView.onCurrentItemChanged: _headerBar.activeStack = stackView
+
     signal goToNextStep()
     signal goToPreviousStep()