Currently, if you have a situation where you have:
Path A
and
Path B, whose 'Data' Property is bound to Path A's.
Resulting in any changes made to Path A's geometry, being reflected in Path B's.

However, if Path A is Deleted, Path B continues to render, almost manifesting a 'ghost' or 'cached' version of Path A, until the Page is closed and re-opened.

Repro Steps:

1) Download and open the attached Studio Project.

2) Identify the Elements named "Logo_Blurrer" and "Logo_Artwork_Master"
Observe how the 'Data' of "Logo_Blurrer" comes from the Data of "Logo_Artwork_Master" via a Binding.

3) Delete Logo_Artwork_Master.
Observe how the shape of Logo_Artwork_Master persists on-screen even if the reference/bound Path is no longer present on-screen.

4) Select Logo_Blurrer, and expand any of its Bindings.
Observe how the 'Element Name' field is blank, but it still displays the shape of Logo_Artwork_Master as if it was still available to this Element.

5) Close and re-open MainPage.xaml
Observe how the shape has now disappeared.

Expected Results: Deleted Elements are not stuck in cache upon their removal.