UITextView in Catalyst, Input Source's character picker panel cover's characters

I made a note app. Some user reports me a bug. When typing with Chinese Pinyin input source, character picker panel will covers characters in UITextView.
Xcode 12.4 MacOS 11.2.3

Demo:
class ViewController: UIViewController {
let tv: UITextView = UITextView(frame: CGRect(x: 50, y: 50, width: 600, height: 200))
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(tv)
}
}
UITextView in Catalyst, Input Source's character picker panel cover's characters
 
 
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