When typing Chinese，the placeholder dosen't immediately disappear

[YaoKaiLun]

Description
When I typing Chinese，the placeholder dosen't immediately disappear.

Recording

Sandbox
https://www.slatejs.org/examples/custom-placeholder

[YaoKaiLun]

My current solution like below:

const [isTyping, setIsTyping] = useState(false);
const handleMouseDown = useCallback(event => {
    if (event.keyCode === 229) {
      setIsTyping(true);
    }
    ...
}, []);
const handleContentChange = (...props) => {
    setIsTyping(false);
    ...
}

<Slate editor={editor} value={content} onChange={handleContentChange}>
      <Editable
        ...
        onKeyDown={handleMouseDown}
        placeholder={isTyping ? '' : 'Type something'}
      />
 </Slate>

[YaoKaiLun]

Finnally, I use this:

<Editable
     placeholder={isComposing ? '' : 'Type something'}
     onCompositionStart={() => setIsComposing(true)}
     onCompositionEnd={() => setIsComposing(false)}
/>