Background blur does appear to allow transparency when used in a widget component

Background blur does appear to allow transparency when used in a widget component

1. Open the editor
2. Create a new widget blueprint
3. Add a background blur widget to the designer tab
4. Set the blur strength to 10
5. Save and compile
6. Create a new actor blueprint
7. Add a widget component
8. Set the widget component to use the widget blueprint created in the earlier steps
9. Add the actor blueprint to the level
10. Notice that the Widget blueprint is full opaque

Expected: The Widget component would be transparent causing things behind it to blur
Result: The widget component is fully opaque