diff --git a/libtaskmanager/tasksmodel.cpp b/libtaskmanager/tasksmodel.cpp
--- a/libtaskmanager/tasksmodel.cpp
+++ b/libtaskmanager/tasksmodel.cpp
@@ -70,6 +70,7 @@
     bool launchInPlace = false;
     bool launchersEverSet = false;
     bool launcherSortingDirty = false;
+    QSet<QModelIndex> dirtyLaunchers;
     QList<int> sortedPreFilterRows;
     QVector<int> sortRowInsertQueue;
     QHash<QString, int> activityTaskCounts;
@@ -377,14 +378,30 @@
                     const QModelIndex &launcherIndex = launcherTasksModel->index(j, 0);
 
                     if (appsMatch(sourceIndex, launcherIndex)) {
-                        QMetaObject::invokeMethod(launcherTasksModel, "dataChanged", Qt::QueuedConnection,
-                            Q_ARG(QModelIndex, launcherIndex), Q_ARG(QModelIndex, launcherIndex));
+                        dirtyLaunchers.insert(launcherIndex);
                     }
                 }
             }
         }
     );
 
+    QObject::connect(filterProxyModel, &QAbstractItemModel::rowsRemoved, q,
+        [this](const QModelIndex &parent, int first, int last) {
+            Q_UNUSED(parent)
+            Q_UNUSED(first)
+            Q_UNUSED(last)
+
+            if (launcherTasksModel && !dirtyLaunchers.isEmpty()) {
+                foreach(const QModelIndex &launcherIndex, dirtyLaunchers) {
+                    QMetaObject::invokeMethod(launcherTasksModel, "dataChanged",
+                        Q_ARG(QModelIndex, launcherIndex), Q_ARG(QModelIndex, launcherIndex));
+                }
+
+                dirtyLaunchers.clear();
+            }
+        }
+    );
+
     // Update anyTaskDemandsAttention on source data changes.
     QObject::connect(groupingProxyModel, &QAbstractItemModel::dataChanged, q,
         [this](const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles) {