Index: sources/gui/qml/pages/pretreatment/PreTreatmentDisposablesStack.qml
===================================================================
diff -u -r695e95aa2ec5e6e1c395567449ac0f671ecd61ed -rbd01334f257c35b96b7b232beacbcd7fae60c852
--- sources/gui/qml/pages/pretreatment/PreTreatmentDisposablesStack.qml	(.../PreTreatmentDisposablesStack.qml)	(revision 695e95aa2ec5e6e1c395567449ac0f671ecd61ed)
+++ sources/gui/qml/pages/pretreatment/PreTreatmentDisposablesStack.qml	(.../PreTreatmentDisposablesStack.qml)	(revision bd01334f257c35b96b7b232beacbcd7fae60c852)
@@ -88,13 +88,18 @@
     }
 
     Connections { target: vPreTreatmentStates
-        onSelfTestNoCartridge_startChanged          : { if ( vselfTestNoCartridge_start         )   page( _preTreatmentDisposablesSelfTest              )}
-        onInstallationChanged                       : { if ( vinstallation                      )   page( _preTreatmentDisposablesCartridgeInstallation )}
+        onSelfTestNoCartridge_startChanged  : { if ( vselfTestNoCartridge_start         ) {                                                     }}
+        // FW doesn't go all the time to start so the main state change should be sufficient to update the disposables stack.
+        onSelfTestNoCartridgeChanged        : { if ( vselfTestNoCartridge               ) page( _preTreatmentDisposablesSelfTest                )}
+        onInstallationChanged               : { if ( vinstallation                      ) page( _preTreatmentDisposablesCartridgeInstallation   )}
     }
 
     onVisibleChanged: {
         if (visible) {
             _mainMenu.hidden = true
         }
+        else {
+            stackView.initialItem = null
+        }
     }
 }