Repro Steps:

1) Create a Project containing a MainPage.xaml

2) Create a Component, and within it, set the ComponentRoots Alignments to Centre-Centre.

3) Introduce a Star Shape to the Component's Root, give it a count of 6, and set its dimensions to 256x256.

4) Save the Component, and return to MainPage.xaml

5) Introduce the Component created in Step 2 to the Stage of the MainPage.xaml, into the Root Grid.

6) Set the Width of the Component to 512.

7) In the Height value of the Component, set a Binding of Relative-->Self-->Actual Width.

Observe as the Height value reflects the 512 set for the Width, in a yellow border.

8) With the Selection Tool [V] equipped, select the Component on the Stage or within the Navigator.

9) Use the keyboards ArrowKeys, or [Shift+ArrowKeys] to move the Component in any direction.

Observe how the Margin values correctly change with each ArrowKey press, but the Height Binding set in Step 7) gets deleted.

10) Repeat Step 7 to make the Binding again.

11) Adjust the Margin by either clicking and dragging over the field, or by inputting a new value.

Observe how the Binding doesn't get deleted.

Expected Results: Adjusting the Margins with the ArrowKeys shouldn't wipe a Dimension Binding.