Index: sources/gui/qml/pages/pretreatment/PreTreatmentWaterSampleStack.qml
===================================================================
diff -u -rc8de9dc4cb679628ac9c0c9551bc43ad3c415d4a -rbd01334f257c35b96b7b232beacbcd7fae60c852
--- sources/gui/qml/pages/pretreatment/PreTreatmentWaterSampleStack.qml	(.../PreTreatmentWaterSampleStack.qml)	(revision c8de9dc4cb679628ac9c0c9551bc43ad3c415d4a)
+++ sources/gui/qml/pages/pretreatment/PreTreatmentWaterSampleStack.qml	(.../PreTreatmentWaterSampleStack.qml)	(revision bd01334f257c35b96b7b232beacbcd7fae60c852)
@@ -136,5 +136,8 @@
         if (visible) {
             _mainMenu.hidden = true
         }
+        else {
+            stackView.initialItem = null
+        }
     }
 }