Index: sources/gui/qml/pages/MainStack.qml
===================================================================
diff -u -r40ddf63592b60608ae34aeb3099fe4e62ae45054 -rcc7aae88f15228ff37b840946818692e444718bf
--- sources/gui/qml/pages/MainStack.qml	(.../MainStack.qml)	(revision 40ddf63592b60608ae34aeb3099fe4e62ae45054)
+++ sources/gui/qml/pages/MainStack.qml	(.../MainStack.qml)	(revision cc7aae88f15228ff37b840946818692e444718bf)
@@ -134,6 +134,7 @@
         }
 
         function onHomeChanged                  ( vValue ) { page( _startupScreen                   , vValue    )}
+        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    )}