Return values are not saved in blueprint functions

Blueprint function return nodes don't save any settings applied directly to the return node itself.

Regression:
Yes - this behavior does not occur in 4.16.3 (CL 3561208)

1. Open UE4 Editor (any project)
2. Add blueprint based on Actor (ActorBP)
3. In MyBlueprint tab, create a new function
4. Add an output parameter and set the return type to Integer
5. Set the value in the Return Node to any non zero number
6. Compile the bleuprint
7. Save and close the project
8. Reopen the project / blueprint function

Result:
The return node resets to 0 when the project reopens

Expected:
Return value is saved when the editor restarts.