diff --git a/shell/autotests/screenpooltest.cpp b/shell/autotests/screenpooltest.cpp
--- a/shell/autotests/screenpooltest.cpp
+++ b/shell/autotests/screenpooltest.cpp
@@ -51,6 +51,7 @@
     cg.deleteGroup();
     cg.sync();
     m_screenPool = new ScreenPool(KSharedConfig::openConfig(), this);
+    m_screenPool->load();
 }
 
 void ScreenPoolTest::cleanupTestCase()
diff --git a/shell/screenpool.h b/shell/screenpool.h
--- a/shell/screenpool.h
+++ b/shell/screenpool.h
@@ -33,6 +33,7 @@
 
 public:
     ScreenPool(KSharedConfig::Ptr config, QObject *parent = nullptr);
+    void load();
     ~ScreenPool() override;
 
     QString primaryConnector() const;
diff --git a/shell/screenpool.cpp b/shell/screenpool.cpp
--- a/shell/screenpool.cpp
+++ b/shell/screenpool.cpp
@@ -30,6 +30,14 @@
     connect(&m_configSaveTimer, &QTimer::timeout, this, [this](){
         m_configGroup.sync();
     });
+}
+
+void ScreenPool::load()
+{
+    m_primaryConnector = QString();
+    m_connectorForId.clear();
+    m_idForConnector.clear();
+
     QScreen *primary = qGuiApp->primaryScreen();
     if (primary) {
         m_primaryConnector = primary->name();
diff --git a/shell/shellcorona.cpp b/shell/shellcorona.cpp
--- a/shell/shellcorona.cpp
+++ b/shell/shellcorona.cpp
@@ -627,6 +627,8 @@
 
     disconnect(m_activityController, &KActivities::Controller::serviceStatusChanged, this, &ShellCorona::load);
 
+    m_screenPool->load();
+
     //TODO: a kconf_update script is needed
     QString configFileName(QStringLiteral("plasma-") + m_shell + QStringLiteral("-appletsrc"));
 
@@ -1184,7 +1186,7 @@
             //in the case of a corrupt config file
             //with multiple containments with same lastScreen
             //it can happen two insertContainment happen for
-            //the same screen, leading to the old containment 
+            //the same screen, leading to the old containment
             //to be destroyed
             if (!cont->destroyed() && cont->screen() == screenNum && cont->activity() == activity) {
                 return cont;