WNS: Revoked channel URL

Describe the bug

Hello, I'm trying to migrate my XAML Islands app to Windows App SDK 1.5. A background process (normal background app without visible window, not Windows Runtime Component) handles raw notifications from my server and send them to main process using App Service. I followed this article: https://learn.microsoft.com/en-us/windows/apps/windows-app-sdk/notifications/push-notifications/push-quickstart and I'm able to request new channel, send notifications from my server and receive them in my app.

I noticed that channels are sometimes revoked before the expiration time. I didn't observe any specific moment or pattern of revocation. However, new manager from Microsoft.Windows.PushNotifications namespace doesn't have ChannelsRevoked method and I don't know how to handle moment of revocation.

I don't think I should use PushNotificationChannelManager from Windows.Networking.PushNotifications. Can you help me? :)

Couple of logs from my server:

2024-05-26 20:20:45.419 +02:00 [INF] Notification sent. Status code: Gone, delivery status: revoked.
2024-05-26 20:20:45.419 +02:00 [WRN] X-WNS-Debug-Trace: AM3PEPF00006225
2024-05-26 20:20:45.419 +02:00 [WRN] X-WNS-Error-Description: Revoked channel URL
2024-05-26 20:20:45.420 +02:00 [WRN] X-WNS-Msg-ID: 3155CBC13625D6D0

Steps to reproduce the bug

1. Create new project
2. Follow this article: https://learn.microsoft.com/en-us/windows/apps/windows-app-sdk/notifications/push-notifications/push-quickstart

Expected behavior

No response

Screenshots

No response

NuGet package version

Windows App SDK 1.5.3: 1.5.240428000

Packaging type

Packaged (MSIX)

Windows version

Windows 11 version 22H2 (22621, 2022 Update)

IDE

Visual Studio 2022

Additional context

No response

Start with the Windows App SDK 1.5 push notifications quickstart and compare its channel-management guidance with the Microsoft.Windows.PushNotifications and Windows.Networking.PushNotifications APIs. Reproduce the packaged MSIX setup on Windows 11 22H2 and investigate when a server receives the “Revoked channel URL” response; done means the revocation behavior and supported handling path are documented.