diff --git a/lib/common/widgets/flutter/text_field/controller.dart b/lib/common/widgets/flutter/text_field/controller.dart
index dd1086c30..0e491377a 100644
--- a/lib/common/widgets/flutter/text_field/controller.dart
+++ b/lib/common/widgets/flutter/text_field/controller.dart
@@ -652,6 +652,9 @@ class RichTextEditingController extends TextEditingController {
         }
 
       case TextEditingDeltaNonTextUpdate e:
+        if (!_isSelectionValid(e.selection, items.lastOrNull?.range.end ?? 0)) {
+          return;
+        }
         newSelection = e.selection;
         if (newSelection.isCollapsed) {
           final newPos = dragOffset(newSelection.base);
@@ -684,6 +687,10 @@ class RichTextEditingController extends TextEditingController {
     }
   }
 
+  static bool _isSelectionValid(TextSelection selection, int length) {
+    return selection.start <= length && selection.end <= length;
+  }
+
   TextStyle? composingStyle;
   TextStyle? richStyle;
 
diff --git a/lib/common/widgets/flutter/text_field/editable_text.dart b/lib/common/widgets/flutter/text_field/editable_text.dart
index 8693025ca..8300beafc 100644
--- a/lib/common/widgets/flutter/text_field/editable_text.dart
+++ b/lib/common/widgets/flutter/text_field/editable_text.dart
@@ -3568,10 +3568,12 @@ class EditableTextState extends State<EditableText>
       remoteValue = delta.apply(remoteValue);
     }
 
+    final plainText = widget.controller.plainText;
+    final composing = textEditingDeltas.last.composing;
     final newValue = TextEditingValue(
-      text: widget.controller.plainText,
+      text: plainText,
       selection: widget.controller.newSelection,
-      composing: textEditingDeltas.last.composing,
+      composing: composing.end <= plainText.length ? composing : .empty,
     );
 
     updateEditingValue(newValue, remoteValue: remoteValue);