Repro steps:
1. Open QA attached project "animationEvents"
2. Make sure the Animation Window is opened
3. Select game object "Cube" in the Hierarchy
4. Click on the animation event in the Animation Window
5. Try to assign a function to the event in the Inspector

Expected: you are able to choose an overloaded function for the event to call
Actual: overloaded functions don't appear in the drop-down

Reproducible with: 2017.1.4f1, 2017.2.3f1, 2017.4.4f1, 2018.1.2f1, 2018.2.0b5