Float values do not show up on the curve editor when animating widgets

If the user has a float value that is exposed on a widget and that widget is added to another widget (via the user created) section, the the float value will not show up on the curve editor of any animations.

1. Open the editor
2. Create a new widget blueprint (Widget1)
3. Open the event graph
4. Add a float variable (name it "Float Value")
5. Make the variable public
6. Save and compile
7. Make a second widget blueprint (widget2)
8. Add the first widget blueprint to the designer tab of the second widget blueprint
9. Create a new animation
10. Add a key frame for widget1's float value
11. Add a second key frame for widget1's float value later on the time line
12. Click the "Curve Editor" button
13. Notice that the value does not show up on the animate timeline when "Curve Editor" is turned on

Expected: The float value would be modifiable on the curve eidtor
Result: Cannot modify float values in the curve editor in the animation timeline

UMG Widget curve editor doesn't show float curves