Looking for the reason my application misbehaves I realized the implementation is just truly bizarre: https://github.com/jamsoft/JamSoft.AvaloniaUI.Dialogs/blob/bf8646925fc9a2a3e1d0f9526ffbb53830134aba/src/JamSoft.AvaloniaUI.Dialogs/MessageBoxService.cs#L66. It does nothing but block indefinitely.
Looking for the reason my application misbehaves I realized the implementation is just truly bizarre:
JamSoft.AvaloniaUI.Dialogs/src/JamSoft.AvaloniaUI.Dialogs/MessageBoxService.cs
Line 66 in bf86469