diff --git a/applets/taskmanager/package/contents/ui/Task.qml b/applets/taskmanager/package/contents/ui/Task.qml
--- a/applets/taskmanager/package/contents/ui/Task.qml
+++ b/applets/taskmanager/package/contents/ui/Task.qml
@@ -334,7 +334,7 @@
             onContainsMouseChanged:  {
                 if (containsMouse) {
                     toolTipDelegate.parentTask = task;
-                    toolTipDelegate.parentIndex = itemIndex;
+                    toolTipDelegate.rootIndex = tasksModel.makeModelIndex(itemIndex, -1);
 
                     toolTipDelegate.appName = Qt.binding(function() {
                         return model.AppName;
diff --git a/applets/taskmanager/package/contents/ui/ToolTipDelegate.qml b/applets/taskmanager/package/contents/ui/ToolTipDelegate.qml
--- a/applets/taskmanager/package/contents/ui/ToolTipDelegate.qml
+++ b/applets/taskmanager/package/contents/ui/ToolTipDelegate.qml
@@ -33,8 +33,10 @@
 import org.kde.taskmanager 0.1 as TaskManager
 
 PlasmaExtras.ScrollArea {
+    id: toolTipDelegate
+
     property Item parentTask
-    property int parentIndex
+    property var rootIndex
 
     property string appName
     property int pidParent
@@ -80,31 +82,45 @@
         });
     }
 
-    Item {
-        id: contentItem
-        width: childrenRect.width
-        height: childrenRect.height
+    Component {
+        id: singleTooltip
 
         ToolTipInstance {
-            visible: !isGroup
+            submodelIndex: toolTipDelegate.rootIndex
         }
+    }
+
+    Component {
+        id: groupToolTip
 
         Grid {
             rows: !isVerticalPanel
             columns: isVerticalPanel
             flow: isVerticalPanel ? Grid.TopToBottom : Grid.LeftToRight
             spacing: units.largeSpacing
 
-            visible: isGroup
-
             Repeater {
                 id: groupRepeater
                 model: DelegateModel {
-                    model: tasksModel
-                    rootIndex: tasksModel.makeModelIndex(parentIndex, -1)
-                    delegate: ToolTipInstance {}
+                    model: toolTipDelegate.rootIndex ? tasksModel : null
+
+                    rootIndex: toolTipDelegate.rootIndex
+
+                    delegate: ToolTipInstance {
+                        submodelIndex: tasksModel.makeModelIndex(toolTipDelegate.rootIndex.row, index)
+                    }
                 }
             }
         }
     }
+
+
+    Loader {
+        id: contentItem
+
+        active: toolTipDelegate.rootIndex != undefined
+        asynchronous: true
+
+        sourceComponent: isGroup ? groupToolTip : singleTooltip
+    }
 }
diff --git a/applets/taskmanager/package/contents/ui/ToolTipInstance.qml b/applets/taskmanager/package/contents/ui/ToolTipInstance.qml
--- a/applets/taskmanager/package/contents/ui/ToolTipInstance.qml
+++ b/applets/taskmanager/package/contents/ui/ToolTipInstance.qml
@@ -33,7 +33,7 @@
 import org.kde.taskmanager 0.1 as TaskManager
 
 Column {
-    readonly property var submodelIndex: tasksModel.makeModelIndex(parentIndex, isGroup ? index : -1)
+    property var submodelIndex
     readonly property int flatIndex: isGroup && index != undefined ? index : 0
 
     spacing: units.smallSpacing