UUserWidget Parameter in blueprints appears to set the parameter value back to the default value on compile

Modifying the default value of a UUserWidget parameter declared in a c++ in blueprints appears to have no effect after compiling. The default value will reset back to "none".

Additional info. The property was set to be "EditDefaultsOnly"

UPROPERTY(EditDefaultsOnly)
UUserWidget* TestWidget;

1. Download that attached project
2. Generate Visual studio project files
3. Open project
4. Open the "ThirdPersonCharacter" blueprint
5. Set the "Test Widget" value to anything other than "None" (VREDAnimationSampleUI is available by default)
6. Compile

Result: The Property will be set back to "None"
Expected: The property value of test widget would be retained after compiling the blueprint