iOS TextInput Component with nested text

I have reported before (link) but no response and issue has been closed.

Description:

Hi there! I have just found a bug on iOS multiple TextInput with using nested text display, which not able to have the correct style in some special cases. (Android works fine with the same code.)
As I need to have different style for different text in the same the text input box, nested text is applied instead of changing the style in TextInput

React Native version: 0.61

Steps To Reproduce

1. Start editing
2. Type Chinese / Emoji FIRST
3. type other wordings

Results

Start with Chinese wordings: style will be update after typing english / number
Start with Emoji: style won't be update

Expected Results

wordings will be having the style set, but still in default style

Code example:

<TextInput
   onChangeText={text => {
              this.setState({
                text
              })
            }}
>
   <Text style={{ color: 'red' }}>{this.state.text}</Text>
</TextInput>

Screenshot:

Normal case

Error case in which start with Chinese

Resume after typing english / number

Error case in which start with Emoji

I have a quick study and find that - (void)setAttributedText:(NSAttributedString *)attributedText from /node_modules/react-native/Libraries/Text/TextInput/Multiline/RCTUITextView.m is not called in the following case.

Thanks for your time and hope to hear feedbacks from your team!

Tái hiện hành vi của iOS với ví dụ TextInput lồng nhau, bắt đầu bằng văn bản tiếng Trung và emoji. Kiểm tra node_modules/react-native/Libraries/Text/TextInput/Multiline/RCTUITextView.m, đặc biệt là setAttributedText:. Hoàn tất khi kiểu văn bản lồng nhau được cập nhật chính xác cho các đầu vào này mà vẫn giữ nguyên hành vi mặc định mong đợi.