When double-clicking on an interface function call within a blueprint, the expected behaviour is that it will take you to the implementation of this function. However, it currently does nothing.
1. Create an Interface, with a function.
2. Create a new Actor.
3. Add the Interface to the Actor.
4. Implement the Interface Function on Actor.
5. Implement the node to call the Interface Function on a blueprint graph.
6. Double-click the node to the interface function.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-203770 in the post.