.NET MAUI + Blazor application debugging stops at "App.g.i.cs" file without clear cause

When I run my .NET MAUI + Blazor application, the Visual Studio opens App.g.i.cs file and highlights theglobal::System.Diagnostics.Debugger.Break();:

All clues I found is unclear call stack:

>   Client.dll!Client.WinUI.App.InitializeComponent.AnonymousMethod__3_2(object sender, Microsoft.UI.Xaml.UnhandledExceptionEventArgs e) Line 75    C#    [External Code] 

How I can understand what exactly causes this error?Where I can find more clues?

Currently my project has no sensitive code/data so I can share it.

🌎 GitHub repository

If you will clone this repo, please make sure that you have checked out the @issue/unknown_stop_of_debugger branch.