diff --git a/shell/shellcorona.cpp b/shell/shellcorona.cpp
--- a/shell/shellcorona.cpp
+++ b/shell/shellcorona.cpp
@@ -659,9 +659,9 @@
             addOutput(screen);
         }
     }
-    connect(qGuiApp, &QGuiApplication::screenAdded, this, &ShellCorona::addOutput);
-    connect(qGuiApp, &QGuiApplication::primaryScreenChanged, this, &ShellCorona::primaryOutputChanged);
-    connect(qGuiApp, &QGuiApplication::screenRemoved, this, &ShellCorona::screenRemoved);
+    connect(qGuiApp, &QGuiApplication::screenAdded, this, &ShellCorona::addOutput, Qt::UniqueConnection);
+    connect(qGuiApp, &QGuiApplication::primaryScreenChanged, this, &ShellCorona::primaryOutputChanged, Qt::UniqueConnection);
+    connect(qGuiApp, &QGuiApplication::screenRemoved, this, &ShellCorona::screenRemoved, Qt::UniqueConnection);
 
     if (!m_waitingPanels.isEmpty()) {
         m_waitingPanelsTimer.start();