fix: IME repeat input (#3768)

packages/slate-react/src/components/editable.tsx

@@ -521,9 +521,11 @@ export const Editable = (props: EditableProps) => {
               hasEditableTarget(editor, event.target)
             ) {
               event.preventDefault()
+              if (!state.isComposing) {
                 const text = (event as any).data as string
                 Editor.insertText(editor, text)
               }
+            }
           },
           [readOnly]
         )}