Animation glitch in WinUI ProgressBar when reducing value

Nobody has claimed this yet.

### Describe the bug

The WinUI ProgressBar control exhibits an animation glitch when the Value property is decreased. During this process, the left side of the bar briefly shifts, creating a distracting visual effect.
https://github.com/user-attachments/assets/094c192b-8b90-4ae9-908f-d1d52133c5a4

### Steps to reproduce the bug

1. Paste the below xaml code in MainWindow.xaml
```









```
2. Paste the below code in MainWindow.xaml.cs

```c#
public sealed partial class MainWindow : Window
{
DispatcherTimer dispatcherTimer = new DispatcherTimer();
private int _count = 0;
private double _currentValue = 1;

private int _direction = -1;
public MainWindow()
{
this.InitializeComponent();
dispatcherTimer.Interval = TimeSpan.FromSeconds(0.5);
dispatcherTimer.Tick += DispatcherTimer_Tick;
dispatcherTimer.Start();
}

private void DispatcherTimer_Tick(object? sender, object e)
{
_currentValue += 0.05 * _direction;
if (_currentValue < 0)
_currentValue = 1;
if (_currentValue > 1)
_currentValue = 0;

this.TheProgressBar.Value = _currentValue;
this.ProgressBarvalue.Text = $"{_currentValue}";
this.TheLabel.Text = $"{_count++}";
}
private void OnCounterClicked(object sender, RoutedEventArgs e)
{
_direction *= -1;
_count = 0;
}
}
```

### Expected behavior

The left bar shouldn't blink when reducing the value.

### Screenshots

_No response_

### NuGet package version

WinUI 3 - Windows App SDK 1.6.3: 1.6.241114003

### Windows version

Windows 11 (23H2): Build 22631

### Additional context

_No response_

Start by running the ProgressBar reproduction from MainWindow.xaml and MainWindow.xaml.cs with Windows App SDK 1.6.3, then compare behavior while decreasing and increasing Value. Done means the left side of the bar no longer blinks or shifts when the value is reduced.

Written by the indexing model from the issue text.