diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index 66f291b10..3528a73b1 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -506,6 +506,8 @@ class ControlsManager extends St.Widget {
             () => this._shiftState(Meta.MotionDirection.DOWN));
 
         this._update();
+
+        this.connect('destroy', this._onDestroy.bind(this));
     }
 
     _getFitModeForState(state) {
@@ -715,7 +717,16 @@ class ControlsManager extends St.Widget {
 
     vfunc_unmap() {
         super.vfunc_unmap();
-        this._workspacesDisplay.hide();
+        this._workspacesDisplay?.hide();
+    }
+
+    _onDestroy() {
+        delete this._searchEntryBin;
+        delete this._appDisplay;
+        delete this.dash;
+        delete this._searchController;
+        delete this._thumbnailsBox;
+        delete this._workspacesDisplay;
     }
 
     prepareToEnterOverview() {