diff --git a/lib/src/widgets/raw_editor.dart b/lib/src/widgets/raw_editor.dart
index 066ff675..bf63dd49 100644
--- a/lib/src/widgets/raw_editor.dart
+++ b/lib/src/widgets/raw_editor.dart
@@ -483,8 +483,12 @@ class RawEditorState extends EditorState
         ..startCursorTimer();
     }
 
-    SchedulerBinding.instance!.addPostFrameCallback(
-        (_) => _updateOrDisposeSelectionOverlayIfNeeded());
+    SchedulerBinding.instance!.addPostFrameCallback((_) {
+      if (!mounted) {
+        return;
+      }
+      _updateOrDisposeSelectionOverlayIfNeeded();
+    });
     if (mounted) {
       setState(() {
         // Use widget.controller.value in build()