Transfering an interface function to a native blueprint function does not copy over inputs and outputs

When you remove an interface from a blueprint and choose to transfer the functions over to the blueprint the functions do not keep their inputs and outputs.

Regression: Yes
Works: 4.12.5 @ 3039270
Broken: 4.13 @ 3094606

1. Open QAGame
2. Create a new Actor blueprint and open it
3. Click 'Class Settings' on the Blueprint toolbar
4. In the 'Details' Panel under interfaces add "QABP_TestInterface"
5. Open the "TestConst" function graph
6. Connect the "Test Default Value" pin to the "Test Output" pin
7. Compile and save the Blueprint
8. Back in the Class Settings click "X" to remove the interface
9. On the prompt to transfer over the functions, click "Yes"
10. Open the TestConst function graph

Result: The function no longer contains the inputs/outputs it had before (breaking any connections).