diff --git a/src/plugins/projectexplorer/taskmodel.cpp b/src/plugins/projectexplorer/taskmodel.cpp
index c05614a445f..80280a5595e 100644
--- a/src/plugins/projectexplorer/taskmodel.cpp
+++ b/src/plugins/projectexplorer/taskmodel.cpp
@@ -409,7 +409,8 @@ void TaskFilterModel::updateFilterProperties(
 
 bool TaskFilterModel::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const
 {
-    Q_UNUSED(source_parent)
+    if (source_parent.isValid())
+        return true;
     return filterAcceptsTask(taskModel()->tasks().at(source_row));
 }
 
diff --git a/src/plugins/projectexplorer/taskwindow.cpp b/src/plugins/projectexplorer/taskwindow.cpp
index eb4b9de8ca5..8bb8fa98e2f 100644
--- a/src/plugins/projectexplorer/taskwindow.cpp
+++ b/src/plugins/projectexplorer/taskwindow.cpp
@@ -169,6 +169,7 @@ TaskWindow::TaskWindow() : d(std::make_unique<TaskWindowPrivate>())
 {
     d->m_model = new Internal::TaskModel(this);
     d->m_filter = new Internal::TaskFilterModel(d->m_model);
+    d->m_filter->setAutoAcceptChildRows(true);
 
     auto agg = new Aggregation::Aggregate;
     agg->add(&d->m_treeView);