NavigationView UI doesn't update when setting NavigationView.SelectedItem from code-behind

[HEIC-to-JPEG-Dev]

Describe the bug

When the NavigationView.Selecteditem is set in code behind, the NavigationViewraises an event as expected to show this has happened, and any interrigation of which item is selected is correct, but the UI selector dissapears, with no item showing as selected.

This is required for dynamically generated content where data binding is not possible

Steps to reproduce the bug

Create a xaml NavigationView with items
Select an item in the UI - remember it in code
Select a different item in UI
Select the original selected item in code-behind - all works except the UI does not update

Expected behavior

Regardless of how the currently selected item is selected, the UI should update

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.6.5: 1.6.250205002

Windows version

Windows 11 (24H2): Build 26100

Additional context

No response

[snigdha011997]

@HEIC-to-JPEG-Dev , it would be great if you can share the project where the code is available to investigate the issue into depth to understand the property you are using to reproduce the bug.

[HEIC-to-JPEG-Dev]

Create a project with a navigation view and add some menuitems. Then in code just set the selected index to one of those items.

[HEIC-to-JPEG-Dev]

I have an update on this. SDK 1.7 has the same issue, however, if i add the nuget package csWinrt 2.2, the issue goes away and it responds (mostly) correctly. The resource "NavigationViewItemBackgroundSelected" is ignored until the user clicks on it.

[michael-hawker]

FYI @Sergio0694 and @manodasanW, thoughts on why updating CsWinRT could be a factor here?