DataGrid Vertical Scroll Bar Problem

[keynes1981]

I found a strange problem when I was using DataGrid:
1、When the app is started, the window size is normal
2、Added enough data into DataGrid to make the Vertical Scroll Bar be shown.
2、Use the mouse wheel to scroll the Vertical Scroll Bar down to the bottom of DataGrid.
3、Maxiumize the window size
4、Scroll the Vertical Scroll Bar up to the top of DataGrid
5、Scroll the Vertical Scroll Bar down until it cannot move, the last item of the datagrid is already in view, but the the scroll bar doesn't reach the bottom,it has a few distance to the bottom.

AvaloniaApplication4.zip

`

<DataGrid Margin="50" ItemsSource="{Binding People}"
		   GridLinesVisibility="All"
		   BorderThickness="1" BorderBrush="Gray">
	<DataGrid.Styles>
		<Style Selector="DataGrid /template/ScrollBar#PART_VerticalScrollbar">
			<Setter Property="AllowAutoHide" Value="False"/>
		</Style>
	</DataGrid.Styles>
	<DataGrid.Columns>
		<DataGridTextColumn Header="First Name"  Binding="{Binding FirstName}"/>
		<DataGridTextColumn Header="Last Name" Binding="{Binding LastName}" />
	</DataGrid.Columns>
</DataGrid>

using System.Collections.Generic;
using System.Collections.ObjectModel;

namespace AvaloniaApplication5.ViewModels
{
public partial class MainWindowViewModel : ViewModelBase
{
public ObservableCollection People { get; set; }
public MainWindowViewModel()
{
List persons = [];
for (var i = 0; i < 50; i++)
{
var person = new Person($"First Name {i}", $"Last Name {i}");
persons.Add(person);
}

        People = new ObservableCollection<Person>(persons);
    }
}


public class Person(string firstName, string lastName)
{
    public string FirstName { get; set; } = firstName;
    public string LastName { get; set; } = lastName;
}

}`

[msneijders]

Avalonia's ControlCatalog.Desktop DataGridPage shows the same vertical scrollbar behavior. I think you should turn this into an issue, to see if it can be fixed.