label not updated in kivy it is write on top of the origenal one

Why in my simple code the label text not updating jus overwrite us you see ? see the button text updated but label not

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty
from kivy.lang import Builder
#from kivy.uix.floatlayout import FloatLayout

Builder.load_file("update_label.kv")


class MyLayout(Widget):
    def press(self):
        # Create varable for our widget
        name = self.ids.name_input.text
        # update the Label
        self.ids.name_label.text = f'Hello {name}'
        
        self.ids.btn.text = f"Hello {name}"

        self.ids.label.text = f"Hello {name}"

class Update_LabelApp(App):
    def build(self):
        return MyLayout()

.kv file

<MyLayout>:
    BoxLayout:
        orientation: "vertical"
        size: root.width, root.height
    
        Label:
            id: name_label
            text: "What is your Name?"

        TextInput:
            id: name_input
            multiline: False
            size_hint: (1, .5)

        Button:
            id: btn
            text: "Submit"
            size_hint: (1, .5)
            font_size: 32
            on_press: root.update_label()

        Label:
            id: label
            text: "hi"

Any suggestion ?