Can't type Chinese with "Use Integrated Keyboard" on IOS

Hello, You know there’s a option: Use Integrated Keyboard in ProjectSetting > IOS and its default value is False. I made a chat UI with a EditableTextBlock widget. I packaged my game for IOS. When I typing text in the chat UI, it auto pops up a alert box on the top of screen. I don’t need the alert box, so I turned Use Integrated Keyboard on and packaged my game again. When I typing text agin, I found that I can’t type Chinese, only English works.I’m not sure wether it’s a bug.
Hope anyone can help me, thanks!

UE4.24.3 fixed this bug