diff --git a/plugins/UM3NetworkPrinting/ClusterUM3OutputDevice.py b/plugins/UM3NetworkPrinting/ClusterUM3OutputDevice.py
index da26e77643..f4675a2e0a 100644
--- a/plugins/UM3NetworkPrinting/ClusterUM3OutputDevice.py
+++ b/plugins/UM3NetworkPrinting/ClusterUM3OutputDevice.py
@@ -61,6 +61,14 @@ class ClusterUM3OutputDevice(NetworkedPrinterOutputDevice):
 
         self._active_printer = None  # type: Optional[PrinterOutputModel]
 
+    @pyqtProperty(QObject, notify=activePrinterChanged)
+    def controlItem(self):
+        if self._active_printer is None:
+            return super().controlItem
+        else:
+            # Let cura use the default.
+            return None
+
     def requestWrite(self, nodes, file_name=None, filter_by_machine=False, file_handler=None, **kwargs):
         # Notify the UI that a switch to the print monitor should happen
         Application.getInstance().showPrintMonitor.emit(True)
diff --git a/resources/qml/PrintMonitor.qml b/resources/qml/PrintMonitor.qml
index 830093cd2b..b3c36f7fd4 100644
--- a/resources/qml/PrintMonitor.qml
+++ b/resources/qml/PrintMonitor.qml
@@ -45,7 +45,7 @@ Column
             Repeater
             {
                 id: extrudersRepeater
-                model: activePrinter.extruders
+                model: activePrinter!=null ? activePrinter.extruders : null
 
                 ExtruderBox
                 {