Self contained applications seem to be missing custom manifest entries

[lhak]

Describe the bug

I have a c# app with a c++ runtime component implementing a video effect. When enabling self contained deployment, I see a crash in the windows media library. I tried to investigate this issue and it seems that the custom activatableClass class entry in the app.manifest file does not end up in the final manifest embedded in the .exe file.

Steps to reproduce the bug

1. Add a custom activatableClass entry to the app.manifest file
2. Observe that it is not contained in the manifest embedded into the final .exe file if self contained deployment is activated

Expected behavior

No response

Screenshots

No response

NuGet package version

1.1.4

Packaging type

Unpackaged

Windows version

Windows 11 version 21H2 (22000)

IDE

Visual Studio 2022

Additional context

No response