Blueprint needs to be compiled if another blueprint sharing an interface is compiled

Blueprint needs to be compiled if another blueprint sharing an interface is compiled

Regression: This does not happen in 4.16

1. Download project
2. Open project
3. Open Actor_BP
4. Open Controller_BP
5. Compile Controller_BP

Result: Actor_BP is dirtied and needs to be re-compiled
Expected: Actor_BP would not need to be compiled or that it would compile it automatically