Providing a BaseUri on a Markdown Engine passed to a MarkdownScrollViewer does nothing

[CirnoNine]

1. Add a Markdown engine with a Key to a ResourceDictionary in scope, and set a BaseUri on it.
2. Add a MarkdownScrollViewer in XAML with it's Engine property set to the above Markdown StaticResource Key: Engine="{StaticResource MyMarkdown}"
   ---> The BaseUri appears to be ignored.

It would be nice to have this properly use the BaseUri on a configured Engine to avoid having to specify it in multiple places.