Describe the bug

I have an editable combo box which allows the user to select predefined items or set another item by typing in its name. The combox box ItemsSource is bound to a list of strings which is changed when action is taken by the user which changes the list of predefined strings. When the ItemsSources changes it appears that the SelectedItem is set to null. I am unable to re-type the same value, and clicking the drop down repopulates the value.

I'm pretty confused about what is going on...

Steps to reproduce the bug

Create 2 editable combo boxes.
Have one 1 combo box ItemsSource rely on the value of the other.
Enter a value like "1" in the combo box.
Change the value of the other combo box to trigger a changes of the items source
The value in the editable combo box is replaced with null and "1" can not be entered.

Expected behavior

For an editable combo box change the items source should not re-trigger the value bound to selected item or text to change.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.5.2: 1.5.240404000

Windows version

Windows 11 (22H2): Build 22621

Additional context

No response