diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index c871d35ea7..9e37fa9049 100644
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -127,6 +127,8 @@ class CuraEngineBackend(Backend):
 
     ##  Perform a slice of the scene.
     def slice(self):
+        self.printDurationMessage.emit(0, [0])
+
         self._stored_layer_data = []
 
         if not self._enabled or not self._global_container_stack: #We shouldn't be slicing.
diff --git a/resources/qml/MonitorButton.qml b/resources/qml/MonitorButton.qml
index 8a232e62f1..bbb39b188e 100644
--- a/resources/qml/MonitorButton.qml
+++ b/resources/qml/MonitorButton.qml
@@ -22,7 +22,7 @@ Rectangle
     {
         if(!printerConnected)
             return UM.Theme.getColor("status_offline")
-        else if(Cura.MachineManager.printerOutputDevices[0].jobState == "printing")
+        else if(Cura.MachineManager.printerOutputDevices[0].jobState == "printing" || Cura.MachineManager.printerOutputDevices[0].jobState == "pre_print")
             return UM.Theme.getColor("status_busy")
         else if(Cura.MachineManager.printerOutputDevices[0].jobState == "ready")
             return UM.Theme.getColor("status_ready")
diff --git a/resources/qml/Sidebar.qml b/resources/qml/Sidebar.qml
index 25931932d3..78930c8d90 100644
--- a/resources/qml/Sidebar.qml
+++ b/resources/qml/Sidebar.qml
@@ -101,12 +101,16 @@ Rectangle
                 iconSource: {
                     if(!printerConnected)
                         return UM.Theme.getIcon("tab_monitor")
-                    else if(Cura.MachineManager.printerOutputDevices[0].jobState == "printing")
+                    else if(Cura.MachineManager.printerOutputDevices[0].jobState == "printing" || Cura.MachineManager.printerOutputDevices[0].jobState == "pre_print")
                         return UM.Theme.getIcon("tab_monitor_busy")
+                    else if(Cura.MachineManager.printerOutputDevices[0].jobState == "ready")
+                        return UM.Theme.getIcon("tab_monitor_connected")
                     else if(Cura.MachineManager.printerOutputDevices[0].jobState == "paused")
                         return UM.Theme.getIcon("tab_monitor_paused")
-                    else if (Cura.MachineManager.printerOutputDevices[0].jobState != "error")
-                        return UM.Theme.getIcon("tab_monitor_connected")
+                    else if (Cura.MachineManager.printerOutputDevices[0].jobState == "error")
+                        return UM.Theme.getIcon("tab_monitor_stopped")
+                    else
+                        return UM.Theme.getIcon("tab_monitor")
                 }
                 checkable: true
                 checked: monitoringPrint