AppointmentManager.ShowAddAppointmentAsync always returns empty string

[Yashu7]

Which sample are you reporting a bug in?
Scenario2_Add.xaml.cs

Example: Scenario2_Add.xaml.cs

Describe the bug
After calling AppointmentManager.ShowAddAppointmentAsync calendar window shows up and disappears immediately, returns empty string. Doesn't throw any exceptions.
https://github.com/microsoft/Windows-universal-samples/blob/7d37b035c2701f189097a5503c9c8e854934479d/Samples/Appointments/cs/Scenario2_Add.xaml.cs#L44C8-L44C8

To Reproduce
Steps to reproduce the behavior:

1. Open app
2. Click on Add an Appointment
3. Click on Add Appointment button
4. Calendar shows up and disappears

Expected behavior
Calendar window should show up and await for me to add or cancel appointment.

Screenshots
This is after calendar window disappears

Configuration
Windows 11 22H2 22621.1928, C#, Visual Studio 2019 Professional

Additional Context
We tried using sample on different machine with similar specs and outcome was the same