MainPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="SpellcheckRedraw.MainPage">

    <ScrollView>
        <VerticalStackLayout
            Spacing="25"
            Padding="30,0"
            VerticalOptions="Center">

            <Image
                Source="dotnet_bot.png"
                SemanticProperties.Description="Cute dot net bot waving hi to you!"
                HeightRequest="200"
                HorizontalOptions="Center" />

            <Label
                Text="Type a misspelllled word. Hit space bar. Word will turn red if toggle is ON (great)."
                FontSize="Medium"
                HorizontalOptions="Center" />

            <Label
                Text="Now turn toggle OFF, red goes away automatically (great)."
                FontSize="Medium"
                HorizontalOptions="Center" />

            <Label
                Text="Now turn toggle back ON, it does NOT come back red."
                FontSize="Medium"
                HorizontalOptions="Center" />

            <Label
                Text="Should turn red when toggle goes back ON... just like it does when toggle is turned OFF."
                FontSize="Medium"
                HorizontalOptions="Center" />
            
            <HorizontalStackLayout>
                <Label Text="Spellcheck" Margin="0,10,10,0"/>
                <Switch x:Name="autoTextCorrectionToggle" Grid.Column="1" IsToggled="true" Toggled="autoTextCorrectionToggle_Toggled" />
            </HorizontalStackLayout>

            <Editor
                x:Name="NoteEditor"
                Text=""
                Placeholder="Type a mispelllled word here"
                FontSize="Small"
                VerticalOptions="FillAndExpand"
                HorizontalOptions="FillAndExpand"
                IsTextPredictionEnabled="True"                    
                IsSpellCheckEnabled="True" />            

        </VerticalStackLayout>
    </ScrollView>

</ContentPage>