TextBlock.TextWrapping="Wrap" doesn't wrap and changes the layout of my window

Avalonia window without the TextBlock at the top:

Avalonia window with the TextBlock (note the result is the same if I set TextWrapping="Wrap" on the TextBlock):

Same code in WPF without TextWrapping="Wrap":

Same code in WPF with TextWrapping="Wrap":

Notice how WPF doesn’t shift the contents outside of the bounds of the window - regardless of whether I have set TextWrapping="Wrap" or not.

Here is my code:

<Window x:Class="MyProjectWPF.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:MyProjectWPF"
        mc:Ignorable="d"
        Title="MainWindow" MaxWidth="300" Height="420">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <TextBlock Text="Describe the bug and what you were doing when you encountered it" TextWrapping="Wrap" Margin="5"/>
        <TextBox Grid.Row="1" Width="NaN" Height="200" Text="{Binding Description}" 
             TextWrapping="Wrap" AcceptsReturn="True" Margin="5"/>
        <DockPanel Grid.Row="2">
            <TextBlock Text="Your name:" Margin="5"/>
            <TextBox Text="{Binding Name}" Margin="5"/>
        </DockPanel>
        <DockPanel Grid.Row="3">
            <TextBlock Text="Email:" Margin="5"/>
            <TextBox Text="{Binding Email}" Width="NaN" Margin="5"/>
        </DockPanel>
        <StackPanel Grid.Row="4">
            <RadioButton Content="Bug Report" Margin="5"/>
            <RadioButton Content="Feature Request" Margin="5"/>
        </StackPanel>
        <TextBlock Grid.Row="5" HorizontalAlignment="Left" Text="--LOG FILES ATTACHED--" 
               Background="Green" FontWeight="Bold" Margin="5"/>
        <Button Grid.Row="5" HorizontalAlignment="Right" Content="Submit" Command="{Binding Submit}" Margin="5"/>
    </Grid>
</Window>

[maxkatz6]

As a workaround for 0.9, instead of <Grid ColumnDefinitions="*"> You can put binding there <Grid Width="{Binding $parent[Window].Bounds.Width}">

[0x90d]

FYI: This workaround fixes the problem on windows but causes a bug under Linux making the Window always being large. A screenshot is available at https://github.com/0x90d/videoduplicatefinder/issues/212#issue-1007183950