Текст не оборачивается в ярлык на ScrollView Kivy

Question

Я пытаюсь получить Labels, который добавляю к GridLayout на ScrollView, чтобы обернуть текст, когда он становится слишком длинным для экрана. Я также хотел бы, чтобы размер ярлыка зависел от объема текста внутри него.

<ChatPage>:
    name: "chat_page"
    layout_content: layout_content

    NavigationLayout:
        id: nav_layout
        MDNavigationDrawer:
            NavigationDrawerIconButton:
                text: "Test"
                on_release: app.root.current = "login"

        FloatLayout:
            MDToolbar:
                pos_hint: {'top': 1}
                md_bg_color: 0.2, 0.6, 1, 1
                left_action_items: [['menu', lambda x: root.ids.nav_layout.toggle_nav_drawer()]]

            ScrollView:
                size_hint: 0.95, 0.6
                pos_hint: {"x": 0.025, "top" : 0.8, "bottom" : 0.5}
                do_scroll_x: False
                GridLayout:
                    id: layout_content
                    cols: 2
                    size_hint_y: None
                    spacing: 10
                    height: self.minimum_height
                    canvas:
                        Color:
                            rgba: (1, 1, 1, 1)
                        Rectangle:
                            size: self.size
                            pos: self.pos

            BoxLayout:
                TextInput:
                    id: msg
                    hint_text: "Type your message here"
                    pos_hint: {"x": 0, "top": 0.15}
                    size_hint: 0.75, 0.15
                Button:
                    text: "Send"
                    background_normal: ""
                    background_color: 0, 0.6, 0, 1
                    pos_hint: {"x": 0.75, "top": 0.15}
                    size_hint: 0.25, 0.15
                    on_release: root.btn_press()

<SmoothLabel>:
    size_hint: None, None
    size: self.texture_size
    padding: 10, 10
    multiline: True
    background_color: 0,0,0,0
    background_normal: ""
    back_color: 1,0,1,1
    border_radius: [6]
    canvas.before:
        Color:
            rgba: 0.2,0.6,1,1 #This changes the label colour
        RoundedRectangle:
            size: self.size
            pos: self.pos
            radius: self.border_radius

py file

import kivy
from kivy.app import App
from kivy.properties import ObjectProperty, StringProperty, NumericProperty, ListProperty
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
from kivy.uix.popup import Popup
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.core.window import Window
from kivymd.theming import ThemeManager
import mysql.connector
from kivymd.uix.picker import MDDatePicker
from kivy.uix.scrollview import ScrollView

Window.clearcolor = (1,1,1,1)


class SmoothLabel(Label):
    pass


class ChatPage(Screen):
    layout_content = ObjectProperty(None)
    def btn_press(self):
        if self.ids.msg.text:
            lab1 = Label()
            self.layout_content.add_widget(SmoothLabel(text=self.ids.msg.text))
            self.layout_content.add_widget(lab1)
            self.ids.msg.text = ""
        else:
            pass


class WindowManager(ScreenManager):
    pass


class MyApp(App):
    theme_cls = ThemeManager()

    def build(self):
        kv = Builder.load_file("kivy.kv")
        sm = WindowManager()

        screens = [ChatPage(name="chat_page")]
        for screen in screens:
            sm.add_widget(screen)

        sm.current = "chat_page"
        return sm


if __name__ == '__main__':
    MyApp().run()

Я пробовал приведенный ниже код, предложенный в предыдущем вопрос, но он не решил проблему.

class SmoothLabel(Label):
    @staticmethod
    def create_sized_label(**kwargs):
        max_width = kwargs.pop('max_width', 0)
        if max_width <= 0:
            # just create a SmoothLabel without a text_size
            return SmoothLabel(**kwargs)

        # calculate what the SmoothLabel size will be
        core_label = CoreLabel(**kwargs)
        core_label.refresh()

        if core_label.width > max_width:
            # width is too big, use text_size to force wrapping
            return SmoothLabel(text_size=(max_width,None), **kwargs)
        else:
            # width is OK, no need for text_size
            return SmoothLabel(**kwargs)

class ChatPage(Screen):
    layout_content = ObjectProperty(None)
    def btn_press(self):
        if self.ids.msg.text:
            lab1 = Label()
            self.layout_content.add_widget(SmoothLabel.create_sized_label(text=self.ids.msg.text, max_width=self.layout_content.width))
            self.layout_content.add_widget(lab1)
            self.ids.msg.text = ""
        else:
            pass