When I touch in the TextField and type character -> suggestion show immediately dismiss and cursor moving to first text. I can't input any text.

If set _textEditingController to TextField above problem has occurred, if not set _textEditingController, the input text is ok(But can't get text has input)

TextEditingController _textEditingController = TextEditingController();

  @override
  void initState() {
    _textEditingController.addListener(() {
      print("CONTROLLER: $_textEditingController");
    });
    super.initState();
  }

Widget _buildTextFieldMemo() {
    return TextField(
      controller: _textEditingController,
      textInputAction: TextInputAction.done,
      onChanged: (String val) {
        setState(() {
          _isValid = _validate();
        });
      },
      keyboardType: TextInputType.multiline,
      maxLines: 4,
    );
  }

Logs.

I/flutter (30849): CONTROLLER: TextEditingController#39911(TextEditingValue(text: ┤đồ ăn sáng.├, selection: TextSelection(baseOffset: 11, extentOffset: 11, affinity: TextAffinity.upstream, isDirectional: false), composing: TextRange(start: -1, end: -1)))
I/HwSecImmHelper(30849): mSecurityInputMethodService is null
I/HwSecImmHelper(30849): mSecurityInputMethodService is null
I/flutter (30849): CONTROLLER: TextEditingController#39911(TextEditingValue(text: ┤đồ ăn sáng.├, selection: TextSelection(baseOffset: 11, extentOffset: 11, affinity: TextAffinity.downstream, isDirectional: false), composing: TextRange(start: -1, end: -1)))

W/IInputConnectionWrapper(30849): beginBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): setComposingText on inactive InputConnection
W/IInputConnectionWrapper(30849): endBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): finishComposingText on inactive InputConnection
W/IInputConnectionWrapper(30849): beginBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): endBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): beginBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): endBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): beginBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): endBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): beginBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(30849): setComposingText on inactive InputConnection
W/IInputConnectionWrapper(30849): endBatchEdit on inactive InputConnection