Any Key input binding does not respond to any key presses

The input binding "Any Key", which was added in 4.9, does not respond to any key presses.

Regression?:
No: This feature did not exist before 4.9

1. Create a new project based off the Third Person template
2. Navigate to Edit > Project Settings > Input
3. Click the arrow beside Action Mappings and then Jump
4. From one of the drop downs below Jump, select the Any Key
5. Press play and press any key
Result: The mannequin does not jump
Expected: The mannequin should jump with any key press