diff --git a/applets/kicker/plugin/kastatsfavoritesmodel.cpp b/applets/kicker/plugin/kastatsfavoritesmodel.cpp
index cdc4554e4..156f6e778 100644
--- a/applets/kicker/plugin/kastatsfavoritesmodel.cpp
+++ b/applets/kicker/plugin/kastatsfavoritesmodel.cpp
@@ -546,7 +546,7 @@ void KAStatsFavoritesModel::portOldFavorites(const QStringList &ids)
     qCDebug(KICKER_DEBUG) << "Save ordering (from portOldFavorites) -->";
     Private::saveOrdering(ids, clientId, m_activities->currentActivity());
 
-    QTimer::singleShot(500, std::bind(&KAStatsFavoritesModel::initForClient, this, clientId));
+    QTimer::singleShot(500, this, std::bind(&KAStatsFavoritesModel::initForClient, this, clientId));
 }
 
 void KAStatsFavoritesModel::addFavorite(const QString &id, int index)
diff --git a/applets/notifications/filemenu.cpp b/applets/notifications/filemenu.cpp
index a459a471c..c287cbc19 100644
--- a/applets/notifications/filemenu.cpp
+++ b/applets/notifications/filemenu.cpp
@@ -138,7 +138,7 @@ void FileMenu::open(int x, int y)
 
     // KStandardAction? But then the Ctrl+C shortcut makes no sense in this context
     QAction *copyAction = menu->addAction(QIcon::fromTheme(QStringLiteral("edit-copy")), i18n("&Copy"));
-    connect(copyAction, &QAction::triggered, [fileItem] {
+    connect(copyAction, &QAction::triggered, this, [fileItem] {
         // inspired by KDirModel::mimeData()
         QMimeData *data = new QMimeData(); // who cleans it up?
         KUrlMimeData::setUrls({fileItem.url()}, {fileItem.mostLocalUrl()}, data);
@@ -146,7 +146,7 @@ void FileMenu::open(int x, int y)
     });
 
     QAction *copyPathAction = menu->addAction(QIcon::fromTheme(QStringLiteral("edit-copy")), i18nc("@action:incontextmenu", "Copy Location"));
-    connect(copyPathAction, &QAction::triggered, [fileItem] {
+    connect(copyPathAction, &QAction::triggered, this, [fileItem] {
         QString path = fileItem.localPath();
         if (path.isEmpty()) {
             path = fileItem.url().toDisplayString();
diff --git a/libtaskmanager/startuptasksmodel.cpp b/libtaskmanager/startuptasksmodel.cpp
index ec82e6200..f042809a3 100644
--- a/libtaskmanager/startuptasksmodel.cpp
+++ b/libtaskmanager/startuptasksmodel.cpp
@@ -122,7 +122,7 @@ void StartupTasksModel::Private::loadConfig()
             // windows appear is not reliable. Add some grace time to make
             // an overlap more likely, giving a proxy some time to arbitrate
             // between the two.
-            QTimer::singleShot(500, [this, id]() {
+            QTimer::singleShot(500, q, [this, id]() {
                 const int row = startups.indexOf(id);
 
                 if (row != -1) {
diff --git a/shell/alternativeshelper.cpp b/shell/alternativeshelper.cpp
index af3047062..c97b27b47 100644
--- a/shell/alternativeshelper.cpp
+++ b/shell/alternativeshelper.cpp
@@ -75,7 +75,7 @@ void AlternativesHelper::loadAlternative(const QString &plugin)
 
     m_applet->destroy();
 
-    connect(m_applet, &QObject::destroyed, [=]() {
+    connect(m_applet, &QObject::destroyed, contItem, [=]() {
         Plasma::Applet *newApplet = nullptr;
         QMetaObject::invokeMethod(contItem,
                                   "createApplet",