diff --git a/resources/qml/Cura.qml b/resources/qml/Cura.qml
index 2399fb4395..b1644ff303 100755
--- a/resources/qml/Cura.qml
+++ b/resources/qml/Cura.qml
@@ -818,7 +818,7 @@ UM.MainWindow
 
     Connections
     {
-        target: Printer
+        target: CuraApplication
         onShowDiscardOrKeepProfileChanges:
         {
             discardOrKeepProfileChangesDialog.show()
diff --git a/resources/qml/SidebarSimple.qml b/resources/qml/SidebarSimple.qml
index 9987268d57..22ad9d460e 100644
--- a/resources/qml/SidebarSimple.qml
+++ b/resources/qml/SidebarSimple.qml
@@ -292,7 +292,8 @@ Item
                         }
 
                         onValueChanged: {
-                            if(Cura.MachineManager.activeMachine != null)
+                            // Only change if an active machine is set and the slider is visible at all.
+                            if(Cura.MachineManager.activeMachine != null && visible)
                             {
                                 //Prevent updating during view initializing. Trigger only if the value changed by user
                                 if(qualitySlider.value != qualityModel.activeQualityId)