diff --git a/cura/Scene/ConvexHullDecorator.py b/cura/Scene/ConvexHullDecorator.py
index da71f6920e..1aae97942a 100644
--- a/cura/Scene/ConvexHullDecorator.py
+++ b/cura/Scene/ConvexHullDecorator.py
@@ -60,13 +60,11 @@ class ConvexHullDecorator(SceneNodeDecorator):
         previous_node = self._node
         # Disconnect from previous node signals
         if previous_node is not None and node is not previous_node:
-            previous_node.transformationChanged.disconnect(self._onChanged)
-            previous_node.parentChanged.disconnect(self._onChanged)
+            previous_node.boundingBoxChanged.disconnect(self._onChanged)
 
         super().setNode(node)
-        # Mypy doesn't understand that self._node is no longer optional, so just use the node.
-        node.transformationChanged.connect(self._onChanged)
-        node.parentChanged.connect(self._onChanged)
+
+        node.boundingBoxChanged.connect(self._onChanged)
 
         self._onChanged()
 
diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 736cb06d49..69978ae69f 100755
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -362,7 +362,6 @@ class MachineManager(QObject):
             # Mark global stack as invalid
             ConfigurationErrorMessage.getInstance().addFaultyContainers(global_stack.getId())
             return  # We're done here
-        ExtruderManager.getInstance().setActiveExtruderIndex(0)  # Switch to first extruder
 
         self._global_container_stack = global_stack
         self._application.setGlobalContainerStack(global_stack)
@@ -370,6 +369,11 @@ class MachineManager(QObject):
         self._initMachineState(global_stack)
         self._onGlobalContainerChanged()
 
+        # Switch to the first enabled extruder
+        self.updateDefaultExtruder()
+        default_extruder_position = int(self.defaultExtruderPosition)
+        ExtruderManager.getInstance().setActiveExtruderIndex(default_extruder_position)
+
         self.__emitChangedSignals()
 
     ##  Given a definition id, return the machine with this id.
diff --git a/plugins/UM3NetworkPrinting/resources/qml/MonitorPrinterCard.qml b/plugins/UM3NetworkPrinting/resources/qml/MonitorPrinterCard.qml
index 8c63e1ef1a..aa4893b3b9 100644
--- a/plugins/UM3NetworkPrinting/resources/qml/MonitorPrinterCard.qml
+++ b/plugins/UM3NetworkPrinting/resources/qml/MonitorPrinterCard.qml
@@ -140,7 +140,7 @@ Item
             {
                 id: printerConfiguration
                 anchors.verticalCenter: parent.verticalCenter
-                buildplate: printer ? "Glass" : null // 'Glass' as a default
+                buildplate: printer ? catalog.i18nc("@label", "Glass") : null // 'Glass' as a default
                 configurations:
                 {
                     var configs = []
diff --git a/plugins/USBPrinting/USBPrinterOutputDevice.py b/plugins/USBPrinting/USBPrinterOutputDevice.py
index 0c195e9017..667a969e87 100644
--- a/plugins/USBPrinting/USBPrinterOutputDevice.py
+++ b/plugins/USBPrinting/USBPrinterOutputDevice.py
@@ -371,10 +371,17 @@ class USBPrinterOutputDevice(PrinterOutputDevice):
 
         self._sendCommand("N%d%s*%d" % (self._gcode_position, line, checksum))
 
-        progress = (self._gcode_position / len(self._gcode))
+        print_job = self._printers[0].activePrintJob
+        try:
+            progress = self._gcode_position / len(self._gcode)
+        except ZeroDivisionError:
+            # There is nothing to send!
+            if print_job is not None:
+                print_job.updateState("error")
+            return
 
         elapsed_time = int(time() - self._print_start_time)
-        print_job = self._printers[0].activePrintJob
+
         if print_job is None:
             controller = GenericOutputController(self)
             controller.setCanUpdateFirmware(True)
diff --git a/resources/qml/Widgets/NotificationIcon.qml b/resources/qml/Widgets/NotificationIcon.qml
index d06d9f16be..5cf4d17777 100644
--- a/resources/qml/Widgets/NotificationIcon.qml
+++ b/resources/qml/Widgets/NotificationIcon.qml
@@ -25,12 +25,16 @@ Rectangle
     Label
     {
         id: notificationLabel
-        anchors.centerIn: parent
         anchors.fill: parent
         color: UM.Theme.getColor("primary_text")
         horizontalAlignment: Text.AlignHCenter
         verticalAlignment: Text.AlignVCenter
-        font: UM.Theme.getFont("small")
+        font: UM.Theme.getFont("default")
         renderType: Text.NativeRendering
+
+        // This is a bit of a hack, but we don't really have enough room for 2 characters (eg 9+). The default font
+        // does have a tad bit to much spacing. So instead of adding a whole new font, we just modify it a bit for this
+        // specific instance.
+        Component.onCompleted: font.letterSpacing = -1
     }
 }
diff --git a/resources/themes/cura-light/theme.json b/resources/themes/cura-light/theme.json
index f287e60310..4b2f92e6e5 100644
--- a/resources/themes/cura-light/theme.json
+++ b/resources/themes/cura-light/theme.json
@@ -604,7 +604,7 @@
         "toolbox_action_button": [8.0, 2.5],
         "toolbox_loader": [2.0, 2.0],
 
-        "notification_icon": [1.4, 1.4],
+        "notification_icon": [1.5, 1.5],
 
         "avatar_image": [6.8, 6.8],