Repro Steps:

1) Grab the 'Stratus' Project from the GitHub InternalProjects repo.
2) Open the Project, and open Scene.xaml found in the root project directory.
3) Within Scene.xaml, double-click on any Component to open it (Spruces_Left_Spruce_1_Controller is the easiest to double-click whilst in motion on the Page). This will open the Component in its own isolated page.

4) Within the Component, select the ComponentRoot, and expand its DynamicProperties in its Properties Panel and its contents.
5) Set a 'DefaultValue' of 'White' both the 'Color_Left' Property.

Observe how the Path on-Stage which has its fill Brush bound to 'Color_Left' is not displaying the selected 'White'.

6) Close the Component's Tab, and double-click on the Component once again from the Stage of Scene.xaml, to open the Component again.

Observe how now, the White is appearing as expected.

Expected Results: DefaultValues are immediately reflected where employed within a Component.

7) Within the Component, select the ComponentRoot, and expand its DynamicProperties in its Properties Panel and its contents.
8) Clear the value of the 'Color_Left' Property where 'White' was input in Step 5).

Observe how the White is still appearing on-Stage despite being cleared.

9) Close the Component's Tab, and double-click on the Component once again from the Stage of Scene.xaml, to open the Component again.

Observe how the White is still appearing on-Stage despite being cleared, and despite having its tab refreshed like was the solution for getting the White to initially appear.

10) Close and restart the application, and re-open the Project.

11) With the Project re-open Scene.xaml found in the root project directory, then double-click on any Component to open it (Spruces_Left_Spruce_1_Controller is the easiest to double-click whilst in motion on the Page). This will open the Component in its own isolated page.

Observe how the White has now disappeared to display no DefaultValue as expected.

Expected Results: Clearing of DefaultValues takes effect immediately and is visible on-Stage.