Index: sources/gui/qml/pages/MainStack.qml
===================================================================
diff -u -rc62102200fea4a7acdee773156e6647a30d77967 -rf83c14046290cebcd5c9229e76f747e4af586698
--- sources/gui/qml/pages/MainStack.qml	(.../MainStack.qml)	(revision c62102200fea4a7acdee773156e6647a30d77967)
+++ sources/gui/qml/pages/MainStack.qml	(.../MainStack.qml)	(revision f83c14046290cebcd5c9229e76f747e4af586698)
@@ -134,7 +134,7 @@
         }
 
         function onHomeChanged                  ( vValue ) { page( _startupScreen                   , vValue    )}
-        function onStandbyChanged               ( vValue ) { /* It depends on the subModes of the standBy. Handled by onHome.  */   }
+        function onStandbyChanged               ( vValue ) { if ( vTDOpMode.standby ) _preTreatmentCreateStack.clear(vValue)         }
         function onStandbyStartChanged          ( vValue ) { /* It depends on the subModes of the standBy. Handled by onHome.  */   }
         function onStandbyWaitTreatmentChanged  ( vValue ) { if ( vValue ) vDisinfectAdjustDisinfect.hasCancel  = false             }
         function onStandbyWaitDisinfectChanged  ( vValue ) { page( _disinfectStack                  , vValue    )}