TextView doesn't synchronize the binding variable in SwiftUI

Question

I created a simple TextView like this:

import SwiftUI

struct TextView: UIViewRepresentable {

    @Binding var inputText: String

    func makeUIView(context: UIViewRepresentableContext<Self>) -> UITextView {
        return UITextView()
    }

    func updateUIView(_ uiView: UITextView, context: Context) {
//        uiView.text = self.inputText
        self.inputText = uiView.text
    }
}

And the main view contains a variable with a @State wrapper.

import SwiftUI

struct Test: View {
    @State private var inputText: String = ""
    
    var body: some View {
        VStack {
            TextEditor(text: $inputText)
            TextView(inputText: $inputText)
        }
    }
}

struct Test_Previews: PreviewProvider {
    static var previews: some View {
        Test()
    }
}

As I understand, the TextView and TextEditor are connected by this inputText, who has a @Binding wrapper in the definition of TextView. Thus if I type in one of them, another should show the same text. However, to my surprise, the text in these two are completely separated with each other.

If I change the self.inputText = uiView.text to uiView.text = self.inputText, then when I type in TextEditor, the TextView would show the same text, but if I type in TextView, then nothing happens in TextEditor.

Why does this happen?