ComboBox selected values does not update properly when changing the DataContext at Runtime

[Gokul-Subramani]

Describe the bug

When changing the DataContext of the ComboBox at runtime, its selected values do not update properly. I have provided bindings for the SelectedIndex and ItemsSource properties, but when the DataContext is changed, the ComboBox values still do not update correctly.

Sample: MSComboBox.zip

Steps to reproduce the bug

1. Run the Sample.
2. Click on "Reset DataContext" button.

Expected behavior

The Combo Box value should be updated based on selected index.

Screenshots

MSComboBox.mp4

NuGet package version

WinUI 3 - Windows App SDK 1.6.1: 1.6.240923002

Windows version

No response

Additional context

No response