When using script to bind dpad input to an Input Action, the callback function is called when left stick is pressed, instead of dpad buttons.

Repro:
1. Download package and project at: https://github.com/Unity-Technologies/InputSystem
2. Use project Input Test ( Assets -> QA -> Input_Test -> Scenes)
3. Open DualShockISX.cs file
4. Change line 22 to: m_dPadAction.performed += ctx => Debug.Log(ctx.control.name);
5. Enter Playmode and press dpad button and left stick

Note: Nothing seems wrong in the Input Debugger.