diff --git a/shell/modules/Tooltip.qml b/shell/modules/Tooltip.qml
index 01643f3..105a896 100644
--- a/shell/modules/Tooltip.qml
+++ b/shell/modules/Tooltip.qml
@@ -11,8 +11,13 @@ PanelWindow {
     visible: _winVisible
     color: "transparent"
 
+    // Mirror of `screen` captured at construction. Reading `root.screen`
+    // directly in `_shown` couples it to visibility transitions (PanelWindow
+    // re-evaluates `screen` when mapped/unmapped), which feeds back into
+    // `_shown` via `_winVisible` and trips a binding loop.
+    property var assignedScreen: null
     property bool _winVisible: false
-    property bool _shown: M.TooltipState.visible && M.TooltipState.screen === root.screen
+    property bool _shown: M.TooltipState.visible && M.TooltipState.screen === assignedScreen
 
     on_ShownChanged: {
         if (_shown) {
diff --git a/shell/shell.qml b/shell/shell.qml
index eff500c..12828c5 100644
--- a/shell/shell.qml
+++ b/shell/shell.qml
@@ -33,6 +33,7 @@ ShellRoot {
 
             Tooltip {
                 screen: scope.modelData
+                assignedScreen: scope.modelData
             }
 
             LazyLoader {