fix: #918 could not update the link sometimes

frontend/app_flowy/packages/appflowy_editor/lib/src/render/rich_text/flowy_rich_text.dart

@@ -42,7 +42,7 @@ class FlowyRichText extends StatefulWidget {
 }
 
 class _FlowyRichTextState extends State<FlowyRichText> with Selectable {
-  final _textKey = GlobalKey();
+  var _textKey = GlobalKey();
   final _placeholderTextKey = GlobalKey();
 
   final _lineHeight = 1.5;
@@ -53,6 +53,17 @@ class _FlowyRichTextState extends State<FlowyRichText> with Selectable {
   RenderParagraph get _placeholderRenderParagraph =>
       _placeholderTextKey.currentContext?.findRenderObject() as RenderParagraph;
 
+  @override
+  void didUpdateWidget(covariant FlowyRichText oldWidget) {
+    super.didUpdateWidget(oldWidget);
+
+    // https://github.com/flutter/flutter/issues/110342
+    if (_textKey.currentWidget is RichText) {
+      // Force refresh the RichText widget.
+      _textKey = GlobalKey();
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return _buildRichText(context);

frontend/app_flowy/packages/appflowy_editor/test/render/rich_text/checkbox_text_test.dart

@@ -10,8 +10,8 @@ void main() async {
     TestWidgetsFlutterBinding.ensureInitialized();
   });
 
-  group('delete_text_handler.dart', () {
-    testWidgets('Presses backspace key in empty document', (tester) async {
+  group('checkbox_text_handler.dart', () {
+    testWidgets('Click checkbox icon', (tester) async {
       // Before
       //
       // [BIUS]Welcome to Appflowy 😁[BIUS]